Nintendo is very well positioned to have a the Nintendo Switch Family of consoles as their only platform until its successor launches in 2025 or 2026.
Some people are needlessly worried about Xbox 4 and PS5 effecting Nintendo Switch's third party support.
What games need more power nowadays anyway?
If your budget is the same, you are not going to be investing in a ton of graphical improvements, and the developer tools are already streamlined.
The only games requiring more resources are a ever-shrinking sliver of $100+ million budget games.
And now that Nintendo Switch will be established in the production pipeline (especially once it has outsold Xbox One's LTD) with what are very scale-able engines.
I really don't see this being an issue as the years roll on.
Even Square-Enix has remarked that the Nintendo Switch is a great space to bring back more medium budget games. Alluding to that Nintendo Switch's lower Spec Cap (limiting graphical development budgets) serves even the playing field a bit and assists smaller developers and smaller projects in competing with bigger games since there would be less disparity, and people are less focused on spectacle on portable devices.
Sure, there will be a successor at some point, but there is definitely no rush just to garner a few mega budget multiplatform games that are becoming increasingly unsustainable anyway (having to lean on being full price $60 and then also having MTX, DLC, etc. more and more and more just to cover the ever self induced cost bloat in the graphical arms race).
How long the Nintendo Switch's life will be, will be based on how Nintendo manages said revisions, price cuts, first party software, etc. for the console to have a long tail with healthy enough revenue in those years. As well as, all the diversifying they have been putting into motion for many years now (Amiibo, Merchandise, Theme Parks, Mobile Games, Movie Licensing, etc.) finally being in full swing also being a healthy revenue stream supporting those tail end years.
Everything in place so far seems to be able to support the Nintendo Switch having a much longer life before its successor launches.
It will be all down to execution and choice on Nintendo's part. With the current trajectory of things, the proverbial ball is in their court.
