Besides the confusing fact that you bring HTML5 local storage into the equation for some reason, a local web server doesn't necessarily mean more complex deployment/maintenance than maintaining a .NET application.
Besides the confusing fact that you bring HTML5 local storage into the equation for some reason, a local web server doesn't necessarily mean more complex deployment/maintenance than maintaining a .NET application.
Also, pulling numbers out of nowhere isn't going to help your argument.
3 and 5 years are the common life cycle's enterprise IT use when discussing any existing implementation or any new system design. These are not pulled from nowhere.
Oh and as far as I'm concerned "3 to 5 years" is still pulled out of nowhere. You aren't mentioning any sources, just describing a really vague process that you think is "common". If you have a working, flexible system with which you can harness a huge continuous effort in developing the technology behind it for free, you aren't going to kill it off just because your enterprise clock says so.