Maybe, but for an intra-net app that's really negligible. For example, at work, one of our HR billing applications takes 3 full minutes to startup, and uses ActiveX running IE 8. We have to run VMs to use it, but its still in use.

When it comes to enterprise internal apps, the competition is pretty terrible, so you can mop up the field even when shipping something that'd be considered terrible bloated for a SaaS or consumer facing app.