I don't think that's what the poster meant by "They got called IE". IE is notable for - along with the things you mentioned - being about a decade behind in web

I don't think that's what the poster meant by "They got called IE". IE is notable for - along with the things you mentioned - being about a decade behind in web specification support and taking non-standard approaches to whatever features it did have. The implication being in this case that people were calling Safari too "conservative", so to speak.