I am the legal target audience. I have a PC that I use at home for most games and a switch that I use for flights and business trips. I buy most games on physical karts because I prefer them to digital and buying used games on eBay is half as expensive as the eShop. Having 3-4 games on a single chip would be much more convenient than carrying several games with me.

Also I bought it in ~2018. In 2018 there were no other good portable game systems at a reasonable price point. There are a lot of good Nintendo exclusive games series out there. Yes there are modern portable systems that can emulate the switch but I'm not going to buy a new system to emulate something I already own.

It seems like this will be able to play modified games too. I would love to try out some custom games on my switch.

The piracy option is also nice but I could almost justify the kart without that.