Some time ago the project itself seemed nice (toxcore github included) and there were a few nice little clients which even worked, ratox was especially cool (a fifo client), I've made an attempt to switch friends\family to tox back then, and we used toxic and utox for voice calls with one my friend instead of skype.

However, since then it seems as if the changes were not positive.

It's really sad, because it felt as the closest thing to come ideologically to replacing skype with a free and open source technology. I'd say something architecturally similar to tox plus activitypub-connected directory\identity (and maybe history) servers would be a success.