[Eridrus]

Microservices almost always increase the amount of partial failures, but if used properly can reduce the amount of critical failures.

You can certainly misapply the architecture, but you can also apply it well. It's unsurprising that most people make bad choices in a difficult domain.

[Tainnor]

Fault tolerance doesn't necessarily require microservices (as in separate code bases) though, see Erlang. Or even something like Unison.

But for some reason it seems that few people are working on making our programming languages and frameworks fault tolerant.

[Eridrus]

Because path dependence is real so we're mostly building on top of a tower of shit. And as computers got faster, it became more reasonable to have huge amounts of overhead. Same reason that docker exists at all.