I have both.

I’ve had my switch for many years at this point, while my SteamDeck is barely 1 year old. I probably wouldn’t buy a switch today if I didn’t already have one but since I already have one I still use it very occasionally for exclusives I’m excited for (well, actually used it a ton for TotK recently). I don’t have my Switch hacked and would just rather not go through the hassle of finding clean roms to download. The only Switch game I played on my Deck was Diablo III (because the PC version has no controller support or controller-friendly UI) but with Diablo IV now it’s unnecessary.

All that being said, there’s very few Switch exclusives I’m interested in for $60 anymore, even on the horizon, Zelda was probably the last one unless Mario Odyssey 2 is released before the end of the system’s lifetime. And Zelda TotK was honestly the first game I bought for Switch in probably the last 2+ years… my wife played a few things on it but I had switched to PC exclusively (+Steamdeck) and PS5

There’s not a game I prefer on the Switch over the Deck but I do think both systems have their merits. I’ve played through Zelda TotK on Switch recently and play my Deck more often (lately a lot of BG3)

The Deck is honking huge, while the switch is small. I much prefer the size of the Deck to the Switch but there’s a an easy argument to be made there for portability.

The Switch is just more dock-friendly. Any serious Switch owner (who would care about docking) owns a Pro Controller. Docking to and undocking from a TV just works perfectly 100% of the time. You can buy a dock for the Steam Deck and you could Bluetooth a controller but it’s definitely more finicky - specifically with some games especially.

Multi-person household. I have a wife and a kid. I’m very fortunate and my wife has her own Deck but we do share a Switch and a PS5. There were dozens of times I would have played Zelda or FF16 but my wife was using the console so I settled with my Deck. I could easily see the opposite happening if we didn’t each own our own Steamdeck

I don’t have an exact answer for you but I can 100% confirm it works through Heroic.

Switch to desktop, install heroic launcher, install BG3 with default options to internal SSD, launch with Proton Experimental, it will say you need .net so accept the dialogue and download the exe, use Heroic to install the .net exe to the game’s prefix, go to the configuration again and add --skip-launcher (two hyphens at the beginning) to the launch commands.

That’s it, I did that and ran the game from desktop and then used heroic to add it to Steam. Now I launch the game straight through Game Mode. I also added Heroic as a non-steam game so I can launch it occasionally for patches.

Skipping the launcher is important, as is installing the correct .net exe. I’ve read that some folks had the game claim to be installed but then realized it never actually completed successfully because they ran out of disk space during the final step. It’s a very large install. I also read a one-off comment that power tools can break it, if you have that installed through decky loader.