I feature new startups built by solo founders on the front page (for free) to show people that it's possible to build a profitable internet startup to pay the bills. Or, to keep the job and build a retirement fund, or travel fund, or whatever.
I'd say that every developer should think about it. Yes, of course, work your full time dev job but also start thinking and then building some small startups. Maybe you won't reach $10k MRR in a year (although I have many examples on my site who do) but still, you're starting to move in this direction.
And there's this question of "if" – can I succeed? Others are doing it, but me — me personally, can I do it? And I'd say of course, yes, 100% – because it's a matter of making the decision.