Couple of points on this.

1. A lot of problems arise from too few people working on too many things. If it's one-two devs and backlog is growing, the problem is not that you have no time to fix things, but that you're understaffed. If you have enough people, then from the business perspective it shouldn't even be that noticeable that someone is refining previous work, while someone else is building the next thing.

2. If you're not understaffed, then the best time to clean up new code is during or immediately after writing it. A phrase I like to use is "while it's still fresh in memory". You're saving time and not adding new bugs, by not having to remember everything again, load all that context back into your head.

> If you're not understaffed

And it's worth noting that having some fat is good. I can get it when you're a startup and you're trying to pull yourself up by your bootstraps, but at some point of time you need some fat. Too much fat is bad, but no fat is also bad. Startups run lean because they have to but when big businesses run too learn, it's called anorexia.

Indeed, if you read The Goal or The Phoenix Project, they call this "slack". There is a whole theory about why slack matters.

Another way of looking at it is that fat serves a purpose in the body. It's true that if you're optimizing for a very narrow outcome, very low (but not no) fat bodies can look ideal, but for one thing, that's actually a pretty unhealthy body, and for another, the best weight lifters in the world actually have pretty substantial fat reserves to support and sustain their muscles.

No fat can help for going fast and efficient, but it prevents you from going strong.

The previews are valuable though, it makes you look like a wizard when you already know how something broke.

Or incompetent. If you knew this was going to break, why did you approve it? Your only defense is "there was a lot pressure to get into the release xyz". There's not much sympathy for that defense. The animal spirits that thought the broken feature were the most important thing ever are long gone, and frustrations about the new outage caused by the previously most important feature ever have taken over.

Don't approve it! That's actually a thing you can do.

But it makes you feel like Cassandra when you keep warning people about the same problems, and keep running into them months and years down the line.

You can only post the Surprised Pikachu meme so many times before it loses its luster.

Often it's more subtle than just "this is clearly going to take down production in X way at some point." The issue is more like feeling that the logic is too entangled and it's going to be hard to maintain later on, or that a library should or should not have been used, or something done with threads should have been async.

So yeah, not as cut and dried as "I said it would happen and it did" but more like "I had a feeling this was going to turn out to be a pain and sure enough here I am reviewing code that represents that pain."

"There is no later." is my new mantra.

That reminds of codebases littered with Todos… where I like to Yoda it… do or do not, there is no todo.

A TODO is not inherently bad, but I think intent is important— how likely is it that someone will come back here purely with an intention to address that comment? If not likely, then the TODO will be taken up in the context of future refactoring and in that case it's a gift to the person eventually contemplating that work, helping them understand something about the code or context that you realised too late in the project to be able to act on it.

I have to favorite mantras related to this:

There is nothing more permanent than temporary.

... and ...

We don't have time to do it right, but we do have time to do it twice.

> Everyone is happy to smile and nod and the appropriate tickets are filed with deadlines attached

Once I did a final review of a backlog of a project that got decommissioned after a decade of development and use. Most of the "fix tech debt" tickets were still there in the backlog. And how could it be otherwise if the tech debt tickets always got assigned priority 2, and everything the management wanted done got assigned priority 1, and there were always more priority 1 tasks than we could fit into a spring?

Next time, I will have no confusion about what "priority 2" actually means. It's in the backlog to make you feel happy, but you are not supposed to actually ever do it. (If by some miracle all current "priority 1" tickets get done at some moment, some of your team members will be assigned to a different project.)