That’s their own fault. No one needs to “detect” random esoteric browsers. Once you have 4/5 detections you should be good. IE8’s UA hasn’t changed in forever,

That’s their own fault. No one needs to “detect” random esoteric browsers. Once you have 4/5 detections you should be good. IE8’s UA hasn’t changed in forever, so you could just copy-paste one of the many regexes online and keep it unchanged.