Nintendo is always good at supporting its systems past the end of the generation, especially portables. Based on past behavior, I expect that when the Switch 2 comes out, Nintendo is going to market the Switch as a cheap alternative for families who are uncomfortable with the new console price.
“Buy the Switch Lite, now with a lower MSRP, and start enjoying its vast library of great games. Once we release some great Switch 2 games and you are in a better financial position (or saved up), you can buy a Switch 2.”
Four Swords might be the first “must have” Switch Online game for me. My wife and I wanted to play it for years but not at the existing price (multiple GBAs, multiple cartridges, plus a link cable).