When will safari provide a VM image so developers can actually test things on it...

pwdisswordfish2 · on May 17, 2019

Why would you need to? Just test things on another WebKit browser, it will work just as well on Safari.

javagram · on May 17, 2019

What actively-developed WebKit browsers still exist for Windows?

FWIW, the assumption that safari and some random WebKit browser will behave the same seems unsafe to me. The release version of safari will probably be on a newer/older WebKit edition and stuff like tracking protection might behave differently.