SSD lifetime concerns with the M1 are largely FUD (and based on initial reports with bad stats). The SSDs should last for the lifetime of the device even with heavy write usage.
But what's the lifetime of the device? That tends to differ a LOT.
For example I still use my Mac Mini 2011 today. After I stopped using it as desktop it became an ESXi server (because ESXi automatically permits Mac guests if you run on Mac hardware). I've already burned through two good SSDs (Crucial MX).
Non-replaceable SSDs in macbooks predate the M1. The interesting claim (which now appears either to have been entirely erroneous, or based on a bug that has now been fixed) was that the M1 Macs hit the SSDs harder than their predecessors.
If you are just talking about general SSD lifetime issues, then we already have over 5 years of user experience to go on (https://uk.pcmag.com/mac-laptops/86074/15-inch-macbook-pro-u...). And I believe that SSD reliability and lifetime has increased since 2016.
https://appleinsider.com/articles/21/06/04/apple-resolves-m1...