Nintendo is probably afraid of how they will get the majority of the Switch user base to upgrade to Switch 2, Sony doesn't need to fear that at all due to the incredible third party support and third party exclusive games they can get for every new console they make. For Nintendo they know that only new, exclusive first party games will sell the new system. Nintendo also have fewer tech obsessed gamers that will get a new system just for the power upgrade compared to the PS ecosystem.
I mean the PS5 had next to nothing except power upgrade to entise people at release, still people flocked to the system just for the power upgrade. That i don't think happens for new Nintendo consoles, at all. The Switch 2 would bomb if it had the first 2 years the PS5 had for instance in terms of new releases.
Nintendo has many more casuals and families in their ecosystem, that group cares the least about upgrading for power, so Nintendo wants to find ways to get all those people willing to buy a new, more expensive Switch, that is a lot harder than to get tech obsessed gamers to buy your new system because they want 4K gaming experiences.
3rd parties are the least able to take risks on exclusives for new hardware. Nintendo absolutely can, because they directly benefit from increasing new hardware sales as a platform holder, and they have cultivated an extremely long-tail sales model relative to Sony/MS, to the point that they can rely on a customer who arrives to next-gen years late absolutely buying a years-old Mario Kart game, regardless of trends. The reason the crossgen period has been so long for the likes of Sony and Microsoft is because 3rd parties are averse to the risk of selling on platforms with less reach, which is why everything that could possibly be delivered on a PS4 absolutely does so, even including 1st party games.
Sony hardware sells well because they are the de facto choice for a 4K videogame box under your TV in a huge number of markets, and they have strong continuity from PS4. 3rd parties follow them onto new hardware because:
1) A large part of the appeal of their output is often "realism" or elements enabled by tech advancement that will stand out in the market
2) It is financially irresponsible to create e.g. a last-gen exclusive when the power increase makes a cross-gen version near-trivial to implement on modern hardware
3) 3rd parties have incentives to leave behind aging hardware, as it becomes harder to derive more power from them to deliver graphically impressive games
4) Targeting PS5 still allows 3rd parties to target both Steam and Xbox customers due to hardware similarities, so there is still a broad market of customers
As long as 3rd parties continue to fail to compete with Nintendo within Nintendo's genres, Nintendo avoids these issues. The point of reference for comparisons for the next Luigi's Mansion or Animal Crossing can only ever be the previous Luigi's Mansion or Animal Crossing, or maybe an indie title. If you bought the previous games in a Nintendo series and are interested in dipping into the next one, what exactly is your choice besides buying the next Nintendo hardware? As long as the price and hardware offering are reasonable, and the software schedule maintains a similar pace/quality to much of the Switch lifecycle, I don't think Nintendo will have issues with converting people to new hardware. Conversely Sony tried to sell a console on "we believe in generations" as some kind of rebuttal to Xbox, which turned out to be a complete bait-and-switch that led to years of cross-gen software.
