I haven’t heard of any disc game not being able to be played.
There's a number of games that don't come with the whole thing on disk/cart, usually including only the early stages and the rest needs to be downloaded.
Hogwarts Legacy and Jedi Survivor are two fairly recent examples.
The only question I have is what’s gonna happen as game discs are just becoming an access token to download the game and its updates.
That's a big concern. There's communities trying to document which games are complete on the media and can be played from start to end without updates (so no major game-breaking bugs or huge performance issues) like this one:
I'm also part of a FB group that collects cartridge information for Switch games, to document if there's revisions with all updates included.
https://docs.google.com/spreadsheets/d/1CEABCBrPv1tWf89hSZqUunK0JW-sQo8XpxuvZhdtHQs/edit#gid=0
For me too, but noticeably slower than normal.
Looks like the original source is this: https://www.gov.br/mme/pt-br/assuntos/noticias/alexandre-silveira-celebra-recorde-de-carga-das-fontes-renovaveis-no-sistema-interligado-nacional
O Sistema Interligado Nacional registrou consumo recorde de energia nesta quinta-feira (7/2). Às 14h15, a carga total foi de 101.860 megawatt (MW), com 92,4% de fornecimento por fontes renováveis, especialmente usinas hidrelétricas, usinas eólicas, usinas solares e micro e minigeração distribuída, segundo dados do Operador Nacional do Sistema Elétrico (ONS).
Rough translation:
The Sistema Interligado Nacional ("Interconnected National System") registered record energy consumption this wednesday (7/2). At 14h15, the total load was of 101.860 megawatt (MW), with 92,4% provided by renewable sources, in particular hydroeletric plants, wind plants, solar plants plus micro and mini distributed generation, according to data from the Operator Nacional do Sistema Elétrico ("National Electric System Operator") (ONS).
So if I'm understanding correcty this was peak generation.
Either saving on media costs (25GB disc instead of 100GB disc, maybe 1 disc instead of 2 if the game is too big), or even having more time to work on the game.
Developer makes sure the early stages are properly tested, send the disc for manufacturing including only those, use the manufacturing time to tweak/bugfix/optimize more stuff the rest of the game.