For all the "just upgrade" comments:
Internal IT departments have no, no, no incentive to upgrade browsers. "Surfing the internet" is not a reason for IT departments to upgrade.
Internal IT departments have no, no, no incentive to upgrade browsers. "Surfing the internet" is not a reason for IT departments to upgrade.
It's much easier for the app developer to create poorly written hacks for the older js libraries, because they are less likely to force a browser requirement change.
For enterprise apps, 1.9 is going to be around for an extremely long time.
If your startup is C2C, everything is fine, if your B2C or B2B your in trouble. If your B2X then you even do not have the leverage of a contract etc.
Unless they are contributing more revenue than it takes to support them, screw them. For me at least, this is not remotely the case and I'm happy to leave them in the dust.