i recently gave my bike an overhaul for summer....
chain and sprockets were replaced.
i used a spring clip as a temporary measure........ it didnt come off
but the way i see it is, why risk it?
some split links will fail, it is very easy to assemble incorrectly or over damage the clip.
why even take the chance of the chain binding up the rear wheel when you can get the chain rivetted for (in my case) £5 (even though i gave him a tenner)
makes sense, no matter how long some people have ridden on split links.