I was really hoping you'd say it was Foobar2000! You can run Foobar2000 using something like Wine/Bottles, but the UI gets all screwy. Recently, somebody released a Foobar-alike called Fooyin and I love it! Here's how I styled my layout:
Fooyin definitely has some growing to do, but I think it's the best you can do on Linux if the goal is the ability to play bit-pefect music with a similar setup to Foobar2000.
Out of curiosity, what was that perfectly customized music player?
I don't know if you happen to have any other machines available to you, but I do recommend you consider giving it a go on a machine you don't share with another person, or at least dual-booting on that machine. It could be pretty jarring to be dumped onto another operating system so quickly, especially as one works out how to use the programs they had been running just fine before.
I recently made the swap to Linux myself, and a dedicated laptop for that transition has made my life a lot easier. I still have my old laptop on Windows, heavens forbid I absolutely need it, but I do find some issues with compatibility. As another person has mentioned, Roblox does not offer native Linux support, which means you have to run a program that more or less tricks Roblox into thinking you're playing on a smartphone. You can do the same for Bedrock Minecraft if you want to play cross-platform.
For a lot of things there are alternatives that tend to work even better in some ways. For others, there are workarounds. And for others yet, you just can't use some applications you might have been using before.
Hey, I only recently dipped my toes into Linux about a month ago and I went with Fedora, more specifically the KDE spin of Fedora. My experience has been fantastic- I'm not even dual booting and this laptop has become my daily driver! My computer seems pretty similar in terms of specs, it's a ThinkPad X1 Carbon from 2017 that's also rocking an i7 and 16gb RAM. I see a ton of folks recommending Mint or Ubuntu or Pop! as "Linux for noobs" but I feel like you don't necessarily need to start there. I didn't and I've been having a really great time!
Awesome, I'm glad to help spread the good word! Fooyin is still in its infancy it seems, but I'm hoping we'll get some more features in it soon- I'm hoping for spectrogram/waveform visualization as well as EQ.