I personally don't care and a .tar.gz is good enough for me if it works (as an example I use Intellij from a tar.gz installer, is simple and it works)
Here is their initial announcement, https://blog.jetbrains.com/idea/2017/11/install-intellij-ide...
Here is the snap package page for Intellij Ultimate, https://snapcraft.io/intellij-idea-ultimate You can see the usage stats and also the list of other JetBrains packages.
A bit off topic, some advice, don't update your IDE during your work week, sometimes something won't work and you will waste time trying to fix it, I learned my lesson and I download the new version .tar.gz and start using it, if something goes wrong I can go back to the previous version and look into finding a fix later.