This reality seems heavily biased by people with long commutes.
Unfortunately most companies that I have worked with (or might work with) seem to have adopted productivity-killing open plan offices, which are absolutely terrible.
Even when I spend 8 hours in a horrible open plan office, I end up doing most of my actual work at home. The office hours are simply to keep supervisors happy, to attend mandatory (often unnecessary) meetings, and to remain visible.
I was in the same boat and I recommend taking a look at the Stock and Shipping Thread in Reddit's /r/homegym subreddit. [1] I joined their discord/stream for a few weeks and was able to be on top of gym equipment re-stocks and got what I needed pretty quickly, cost being MSRP.
[1] https://www.reddit.com/r/homegym/comments/i5ect0/stock_and_s...
If you're just interested in general fitness, no equipment needed, there are any number of online workouts to follow that will give you a great whole body + cardio workout using nothing more than your body weight.
(though I bought both a spinning bike and a set of dumbbells at the beginning of quarantine... I've finally reached the point where the dumbbells aren't quite heavy enough for everything, so I've been watching eBay for a good deal on additional weight plates since as you noted, it's hard to find workout equipment)
(Btw, yoga with adriene is a very good YouTube yoga channel)
I've been thinking about writing an app to let me turn some of these follow alongs into an interval timer where I could just say the name of the pose (so I could do other things while doing the yoga). Then I could always click on the pose to go back to the video. Does that sound of interest?
I was lucky to get resistance bands and those have been working well at least.
Having a long ass commute and a dog to attend to meant my life was pretty much office and home. I was always too exhausted to consider a serious workout routine. However, since shelter-in-place started I've lost a ton of weight, gotten amazing sleep and never felt physically better. I've been working out daily and walking/hiking on the weekends, if anything, just to get out of my house.
I've also cooked all my meals because I've made it a personal goal to get abs by the end of the year. So I want to know what I'm putting in my body.
This has become a life changing moment for me, so I don't see any reason why this wouldn't be true for others. If the pandemic threw you off your old daily routines, and that's your only reason for giving up healthy habits, were you really committed in the first place? What would have happened if you simply moved or started a family or some other life changing event in the future? Would you just give up your routine then?