I assume there's some technical problem with classic sites, but it doesn't seem to be described on the support.google site. Anyone know what the reason is?
I suspect sites, at some point, didn't make enough money to maintain a separate team with a skill set that wasn't common at Google.
It take 16 months after the purchase before they relaunched it, though. So perhaps they had already rewritten it in a Google tech stack?
(Source: worked at Google 2006 - 2010, was very slightly involved in helping the Jotspot team integrate)