It doesn't mean one path is right or wrong for a job (I know many people who switch back and forth between bigcorp and startups), but if you only see BigCorp experience as status seeking/soul sucking experience, you're missing a huge part of the picture.
Imagine you're a recruiter at Facebook. You reach out to thousands of candidates, convince hundreds to come in for interviews, and almost all of them fail because the interviews are hard and test skills that need to be specifically trained. If you convince a Googler to come in for an interview, they probably have a nearly 50% chance of passing since they've already done it at least once.
The recruiters are not exactly incentivized to bring in people who will be great hires. They are incentivized to bring in people who can pass the interview.
As I mentioned in my comment, no difference if the person is starting out or if the project gets traction.
But for experienced positions like the post author was talking about. You don't get additional signals on the developer, like did the product scale well, how was the uptime, the performance optimisations he needed to do, evolving the product with customer feedback etc. Also, bigcos love to ask around conflicts within a team, working with other teams because it matters a lot to them.
As an engineer I can admire the dexterity of a solution even if unproven but how do I verify it in an interview span. Easier to do this if I can attach it with a company name or some numbers.
I hate this and I spent early part of my career trying to come up with methods that can make hiring easier and reduce biases like company name but I realised how difficult the process is with different stakeholders, each having his own criteria and biases.
You know my hypothesis why, because they don't have side projects. They have silo'd themselves into whatever niche project or have been on maintenance mode on a piece of software for years and never evolve. Sometimes it's not their fault, their company has pigeon-holed them into whatever software and they can't escape for whatever reason.
They should have side projects (if they care to keep learning) or lest be left behind those in more dynamic companies or those that have side projects to evolve.
You know this is a risk. If you went deep on something like Silverlight, you'd have just thrown away all that time. And then people will casually dismiss your 10 years away as not being relevant. And now you get to pick a new technology to maybe invest the next 10 years on, risking the same thing happening again. If a product dies, you go back to square one as a junior again on some new technology.
Picking a long-lasting technology is hard. You're predicting the future.
I'm really tired of people who think they have this industry figured out like it's easy to predict what will be around in 10 years so you can make safe choices about what to invest time into.
I think "going into the weeds" (and not being afraid to do so again, in another context) has some value independently of any specific patterns or tricks that apply to a particular technology.
I think your hypothesis is correct. In my experience, most of the devs I've seen in that position do it to themselves. They get comfortable in their part of the codebase and rarely venture outside. Instead of helping other devs ramp up in their codebase, they just close all the tickets out themselves since that's easier than actually getting someone up to speed. I've gotten close to that situation, but realized what was happening and worked with my manager to take on different projects. It definitely creeps up on you.
He is so much right here. Recruiters don't have the time to go through and understand your side projects, for that matter even engineers don't. Most interviews are 45-60 mins, you need to scope your interview such that the process remains same for all candidates. If someone is just beginning out then side projects matter a lot but for hiring experienced people, most won't care about side projects unless they got significant traction.
Also, it is incredibly hard to judge side projects. Sure, I can go through your Github repo if it is open source, open 2-3 files to see code structure, see the automation suite you have setup but unless the project was complex there is not much to talk about. For experienced folks, there are other metrics you need to gauge them on which are absent in hobby projects.