RetroGaming

I have setup in my bedroom of a TV which eventually I want to get newer TV as one I have is old and also want to watch 4K movies as well as my TV is so old (made somewhere in early 2010s) that most streaming services won't work or if it does, it is sluggish. I heard OSSC Pro output 4K resolution as well as RetroTINK-4X CE which I want to use when I play on my PS2 & Gamecube. I wasn't sure if OSSC Pro still has issue with resolution chance where (especially in PS1 Games), the TV would take few seconds to change resolution instead of just load menu screen or game seamlessly

Before anyone suggest "get a CRT", I don't have room for it and that's even counting the CRT with VHS/DVD bundled in to it. Also, I live in shared household which my family doesn't care for CRT so if I want it, it has to be in my bedroom which is tiny and barely much free space. Maybe when I rent a flat, I might think about CRT but not right now. At least then, I have bit more freedom of the space where I put it and not feel too claustrophobic for me.