Assuming you mean just tech companies, yes, this is now the norm. But I suspect it's mainly due to backlash over the previous period, where many ignorant investors would oust founders and replace them with "professional managers" who would then either run the company into the ground, or sell it for scraps.

So I completely understand why founders, now given the opportunity, would write these sorts of share class structures into their business. It's definitely gone too far, though. But that's usually what happens.