Hopefully it won't end up in a situation where a lot of apps bundle seriously outdated versions and any given system has a dozen old dlls strewn all over. Didn't that kinda happen with bundled flash players - even Adobe shipped exploitable players for years in other products?
Hopefully they do what Firefox tried (and failed) to do: ship a stable, enterprise version and an advanced version. No locking to arbitrary versions, but able to say, support "IE11 and IE Latest" in your product. Hopefully they allow developers to opt into a 30-60 day preview window such that they can remain a bit ahead of their customers.
The Firefox ESR branch is on the same release schedule as the Firefox 'Stable' branch. So, you get a scheduled release every 6 weeks. But ESR just gets the security fixes whereas Stable also gets the new features. When there's an out-of-band security update on Stable (a .1 release), ESR gets that, too. ESR is pegged to specific releases of Stable and operates in parallel for a few releases so there are two different ESRs... the older one and the newer one... so organizations can transition from one browser engine to the next over a couple month timespan and ensure corporate apps work on both.
Oddly, some non-organization people want ESR because they think it's updated less often. It's not.
