How many people are using browsers which don't support Javascript in 2026, and doing so out of necessity rather than out of choice? I can't imagine this number to be >1%.
How many such devices can still support modern TLS certificates anyway? By this logic, shouldn't we also use plain HTTP instead of TLS?
It may only be 1%, but that small fraction of users are also probably the people who sure as hell don't need even one more tiny thing going wrong in their life.
If you're using a decade old phone to sign up for a utility, you've got bigger problems in your life and no self-respecting person should be adding to them.