In reply to David.

It is not good that Gutenberg thing will mean the end to a lot of “Hobbyist” plugins. Those authors and their work was a big factor which made WordPress where it is today. We should never forget that.

Agreed with this assessment. I expect a drop in plugin devs in the coming years. Maybe the plugins released from now on will be of better quality considering the high barrier to entry that comes with all the shiny JS stuff, but I suspect that the dev community won't continue to be as vibrant as it is now.