Well, that's the problem, everyone should be using the onion services if you're using it for privacy/anonymity. Session does it by default, and yet it doesn't ever get *quite* that slow. In fairness, Session did get bogged down pretty hard because of massive DDoS attacks a few months back, but when that's not happening, it's a lot quicker.

My biggest issue with SimpleX really is how it seems that messages take half an hour to catch up. Otherwise, the other flaws are either subjective or minor.