Advances have fallen, generally, for everything except the biggest potential bestsellers. Given all the changes, both economic and technological, SF hasn't done too badly.

I'm a Buddhist, so one of my biggest beliefs is, 'Everything changes, don't take it personally.'

There's certainly more new SF available than when I started writing. That means there's also more bad SF available. Whether there is also more good is a matter for future historians of the field.

Everything I've done I've just fallen into.

but based on solid technological advances.

At some point you need to make investments to keep pace with technological advances.