Which are?
I've had Windows in one disk and Linux in another for maybe a decade and use the boot selection to pick what I want. Never had a single issue.
Although I haven't opened Windows in months, so I'll likely nuke it soon and give more space for my Linux.
Of course running one system is better. Use Linux and stop being miserable ;)
Still, you haven't said what are these extremely horrible cons that two systems have. For me they're so small it's not even comparable to having to submit yourself to a shit Windows system only to avoid the "hassle" of having two systems.
I used Windows only for gaming and Linux for everything else. Now I'm fed up with games that choose to block Linux out, so I no longer need the two systems and couldn't be happier.
I’m sorry but are you being intentionally obtuse? You can’t think of a single downside to running two systems on your machine instead of one? If you lack imagination to that level I can’t help you dude