It's not a terribly large amount of code, and it's easy to test, even with a "live" key (since testing that any n of m can be recombined doesn't force a spend or reveal anything externally).

Also, it's a fairly well-known system, so I don't see it being collectively "forgotten" on the timescale of a few decades (it's been around since the late 70's i believe).

I'd love to get it integrated into wallet software, as it's such a safe and reliable way of storing secrets that lets you be as "secure" or as "reliable" as you want with just a slider.