Hardly, Muc-Off isn't that powerful, and there are few substances out there that will actually damage a chain, it's one of the most resilient pieces of the bike.
GT85/WD40 are just for water displacing, anyone who uses it as a lubricant on its own will likely run into problems quite fast! 3 in 1 and similar are not designed for bikes, thus they will tend to turn everything black and shitty and attract the dirt, but they won't wear off.
Finish Line XC (green cap) is much the same, very viscose, good in really wet conditions or if you don't mind the whole chain looking horrible. Teflon Plus (red cap) is far better in the dry, but it is thinner and thus doesn't last as long.
I've always used White Lightning products, I liked the old RaceDay and I like the new Epic, they're much cleaner, and if applied properly I think they last longer than anything else. Having said that I've been given a new sample of something to try, which is excellent, forget what it's called though! Something Gold i think!
I like the Finish Line XC green-topped stuff in winter. Make sure you wipe the excess off the chain with a rag though or it'll just turn into grinding paste.
Summer, I use Rock N Roll Extreme, sometimes in winter too, which sounds a bit like the White Lightning Epic lube. Sort of half way between a wax and a wet lube, works well and doesn't attract dirt / grit etc.
Half the battle is cleaning the drivechain properly between rides, or at least round here it is. I use one of the Park chain bath things plus Muc Off on the cassette, chain rings etc. Works pretty well and a lot quicker than removing chains and soaking them in some horrible solvent.
Like a lot of other people, I found the standard White Lightning just falls off in UK conditions, probably great in California though.
