Check local retro game stores (they often have a "bargain bin" of multicarts), AliExpress (search "Famicom multicart"), or eBay (search "200-in-1 NES").
Devices like the Anbernic RG35XX , Miyoo Mini , and TrimUI Smart are essentially luxury 200-in-1 machines. They ship with SD cards containing "200 in 1" (actually 5,000 in 1) collections. They take the spirit of the multicart—massive variety, low friction—and add save states, rewind features, and backlit screens. 200 in 1 game
The subscription streaming model (Game Pass, PS Plus) is the enemy of the 200-in-1. It requires licensing, servers, and a monthly fee. The multicart asks for nothing. You buy it once. You plug it in. It works (mostly). Check local retro game stores (they often have