[WalterGR]

    How many complete rewrites of Internet Explorer have we had since then?

None?

There's an ongoing one that was announced in January with a preview released in March. https://en.wikipedia.org/wiki/Microsoft_Edge

[pnash]

Spartan?

https://twitter.com/dildog/status/612795030345007104

"It feels like 1996 again."

[WalterGR]

Microsoft Edge is Project Spartan.

"Microsoft Edge, initially developed under the codename Project Spartan..." (same Wikipedia link as above)