> I vividly remember IE and many hacks to have css elements properly working in it…

These days the most limiting factor is probably people on phones running out-of-date Android with an ancient browser version. If you aren't caring to test on mobile anyway, as many seem not to, or are happy to not spend time catering specifically for that fraction of a % of people in your target audience, this concern goes away and unless you are targetting an industry known for slowly updating its users desktops you are pretty safe using anything that has been in both Chromium and Firefox for two years or more (a couple of ESR releases ago).