

I agree on the outdated UI, but at least it gives you a ton of options that official apps would never allow you, or babysit you too much to offer.
I’ve literally used Calibre 2-3 times, and while the UI seemed daunting at first, it was logical and did did its job quite fast when figured out. And I usually don’t need to use it afterwards for another long period.
It’s a joke that the long-haired person might be trans and had their testicles removed previously.
I’m not sure that was the original joke, but works quite well.