Git is, in my opinion, one of the most brilliant pieces of software ever written (I'd go as far as saying it's Linus' biggest achievement, rather than Linux). It's an example of software that's so well designed that it keeps surprising you (well me, at least) by its versatility and performance.
By now there aren't any serious competitors left and maybe that's what's triggering you to ask "aren't there alternatives". In other areas (backend frameworks, frontend frameworks, operating systems, etc etc etc) there are dozens of alternatives with none of them clearly superior, but Git is indeed dominant, but I'm saying deservedly so.
For me it's a breath of fresh air to have at least one area where I'm not bogged down by too many choices with no clear added value.
Add to that the huge installed based (just Github alone but also in enterprises) and the huge boost which Git (and Github) are for OSS and "social coding" (sharing, contributing) - then the conclusion for me is that any alternative has to be clearly superior, not like 50% or 100% "better" but an order of magnitude better, otherwise it won't stand a chance.
That's a very good take.
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