I'm having trouble replicating my own success from that era. Everything is more complicated today: the development stacks, the competitive landscape, the vast increase in regulations and liability around handling data, the move from an open web to social media silos and mobile apps, scammers and bots winning the spam wars and destroying most online advertising. I still have businesses I started in the 2000s and early 2010s that are very successful, and not so much that's newer and doing as well.
My non-tech ventures are doing well which is nice for a change of pace after decades of coding, though. I bought a bunch of relatively cheap (3-4 figure cost) manufacturing equipment and turned a spare bedroom into a workshop for designing and creating physical goods. I have a line of home decor that sells well enough that I'm dropping a stack of packages off at the post office 5 nights a week.