>>tikkun+hj
Skype became really really terrible, it looks like it's been unmaintained during the past 10 years, I'd rate its usability worse than most open-source software. The sound quality is also awful, it feels like I'm calling a landline.
>>gumby+Ft
In the US I don't know a single person that has access to POTS. Discord (with paid nitro) is the gold standard for quality and latency, followed by all the free VoIP apps