I made about 150 all grain BIAB beers, and actually started that way. I never made a single extract brew. About 9 months ago in a quest to keep refining my process and shorten my day, I started doing the techniques that folks usually do starting out (partial mash, partial boil, using extract, etc). I'll be honest, it's the most fun I've had brewing, and the beers are even better. I'm sure I'm bringing knowledge to it from the all grain batches (water profiles, hopping strategy, fermentation QC, sanitation, kegging practices, etc) that is part of why I'm getting good results. But honestly I wish I had done this sooner. The key to the whole thing is you absolutely have to do a partial mash, I'd say minimum would be 20% of the malt bill in weight should be from the grains. So like 4oz of grains per LB of extract (I use DME). Good luck if you make the switch.