I completely disagree with this and have been for years.
It has often had connectivity issues, big lags, higher latencies and lower bitrates than Mumble or even TeamSpeak.
It's super bloated, they churn out useless "features" so fast that it keeps making it use more resources and makes everything slower.
Until recently, being in voice call with more than 3-4 people made all my 16 cores attempt self destruction.
It is a freemium piece of bloatware.
I totally agree, except also for gaming.
Compared to alternatives, there are often lags and complete disruptions, latency is horrible, bitrate is a paid feature, and for large groups of voice channels (like managing a 500 player operation in Eve), features are still lacking.
Also security is a joke. In Mumble, you can manage (certificate based!) permissions on every level imaginable.
They spend their time on making silly themes and Nitro features nobody cares about.