Bottom line: Stand me in the world's best gun shop, give me unlimited credit, and tell me I can take one - and ONLY one weapon. I'll take the Lee-Enfield, every time. And I'll still be using it when every other weapon there has died of old age or just disintegrated because of the environment.
There are some other rifles that will be kicking around with those old Enfields, although they will all be about the same age and comparable in power. Personally I would take the Finnish M39 (I like Mosin-Nagents) and there would be people who would take the K98s. They all are effective hunting and military weapons and should have no problem with the abuse, although I don't know about the K98s. As far as long serving weapons the Finns are still using rifle build on 100+ year old receivers so those old Mosin-Nagents can't be that bad.
The right of the people
Real Programmers don't write in FORTRAN. FORTRAN is for pipe stress freaks and crystallography weenies. FORTRAN is for wimp engineers who wear white socks.