I was only able to ditch IE for a major customer last year thanks to the new Edge rollout on Windows 10 and Microsoft setting a precedent with their own online

I was only able to ditch IE for a major customer last year thanks to the new Edge rollout on Windows 10 and Microsoft setting a precedent with their own online services (Teams especially). Moving away from old workarounds to newer technologies will be a gradual process over the coming years. The problem isn't just IE marketshare. Not every web developer works in e-commerce, on brochure sites or even SaaS apps with a target audience consisting almost entirely of other startups. If you build products for mostly enterprise customers, those customers often dictate what you support, even if they barely even use it anymore. Changing requirements can be difficult. I remember being asked by a large international company to build a web app in "HTML5 but it must work with IE6" back in the day. Most of their actual users were on Firefox or using iPads.