I've got some conflicted feelings on it.
I won't lie, it does kind of irritate me to think that people do modding and hacking of current gen game consoles, in order to essentially get everything free instead of paying for their games. That's scummy, you should just support the entertainment you consume. Don't be a leech. If you can't afford it, fix your life, or find something else to do that you can afford. It also kind of irritates me that people have already made Nintendo Switch emulators, while it's still a console that's on the market. You have sites like Polygon touting the PC emulated version of Metroid Dread the day it comes out. If you're gonna do that, you should own the damn hardware, and the game first. Again, don't be a leech; support the things you enjoy instead of stealing them.
As for legacy hardware and off-market software, I don't really care what people do with their own stuff. I personally don't own any sort of ROM flash card for any of my consoles. I feel like it kind of defeats the point of my past decade long saga in collecting physical games. I own thousands of games, I don't need even more at my disposal. I don't find pulling a game off of my shelf and putting into a console to be too terrible inconvenient of a task, that I would need redundant ROMs of games which I already own put onto an SD card. Not saying I won't ever own or use one, but currently I've just no interest in it. I've got loads of physical copy games to play; and those which I can no longer afford to buy, don't really matter a whole lot to me in the grand scheme. I'm not convinced that just because it's super expensive and has hype surrounding it, that I must experience that game. I'm pretty well set.
If others wanna go that route, it's fine by me. It's just not my thing. I could only see myself bothering to play ROMs, if it were for a console I'd never collected for and wanted to mess around with, such as the TG-16 or something, which I have no interest in collecting for and currently own nothing for. Although I've contemplated just buying the SNK endorsed emulation box they put out a few years ago.