Over 17 years I started with buckets, went to carboys, tried a better bottle, used a couple V-Vessels, Dropped a 6.5 gallon carboy through the bottom of my brew sink, thought about stainless conicle .......... did the math....
Back to buckets. I still have a couple 5 gallon carboys for long term secondary of big beers. But I have 8 buckets, and that is all I use. Don't see myself ever using anything else again. I also now use bottling buckets with spigots for all fermenting - no more siphoning either. Buckets and spigots are really easy to clean. I replace spigots/buckets as I feel necessary because they are cheap. Have not had a single infection in the last 3-4 years since going back to only buckets (40+ batches per year). I would say I had more infections/problems with all other types of fermenters than with buckets.
To me, the biggest downfall of most other options is the simple fact that they are a PITA to clean. Not buckets.