Almost all of the jetbrain products are just intellij with a different set of plugins preinstalled (with perhaps the exception of clion which has a bit more native integration with debuggers), so you can quite likely just use intellij with a few plugins you want for everything.
Rider is also a bit different in how it handles Visual Studio solution / project files AFAIK. You can definitely rig up IntelliJ for e.g. Python development, but PyCharm is going to be a far better experience.
I pay for the All Products Pack purely out of convenience - If I wanted to spend a ton of time tweaking my IDE, I'd go back to Emacs!
