I miss aspects of those days, because I made a good bit of money from people who used MyISAM because "it's more performant" (or just because it was the default, yes, I'm dating myself here), and then corrupted their data because MyISAM didn't enforce constraints.

Other than the easy money, nah, don't miss the old days that much.

Having to use Reflector to decompile a core .NET library to figure out wtf it was doing because MSDN was inadequate, and the source was very much not open.

PHP 4 code bases that heavily leaned on dangerous globals.

J2EE.

Ah, the "good" ol days.