Could be great for pinned tabs though.
I reckon this is one of the main reasons they're back.
I just installed Safari TP58 and am willing to give them a go for a week or so, but I already remember why I didn't miss them in the first place. Too many of them are just ******. No transparency, logos shrunk down into a completely non-iconic and unrecognisable pixel soup. Some websites do put effort into their favicons, but for many others white squares with coloured barf inside will now disgrace the Safari tabs...