This seems to be the summary of every tech flame war ever, and applies rather well here:

A: I've used tech X in a lot of Y contexts, and I find it's not great. I will generalise slightly imply that tech X is not the panacea that it has been presented as.

B: Yeah? Well, I've used tech X in a lot of Z contexts, and I find it works fine! You're wrong! You're using it wrong! Maybe you're not wrong in context Y, but for most other contexts X is still the best tech!

C: I haven't used tech X at all, but here's my opinion on it anyway.