[0] Actually since I had the idea waaaay before the business need and project, I had a personal MIT-licensed clean room toy implementation of it sleeping somewhere on my hard drive and used that for the business prototype.
The reason is, I don't think there is a single website out there, which couldn't be described in a spreadsheet.
What I suggest though, is take a look at this, and throw your companies sheet at it in a 30 minute hack session. If this proves unfruitful, I'd be happy to hear all about it.
Spreadsheets are a terrible way to make web-sites, though.
One of the bits I agree about, is that we should be very wary that we, developers, don't get replaced by one.
Friendly reminder that this is literally the whole point of the job. Automation. Making people stop doing tasks that can be done by machines - which often means replacing people with code. Sometimes even ourselves.
Spreadsheets > Web.It currently maintains millions of business software jobs.
Well, too bad the smart guys in Silicon Valley are busy perfecting their yak shaving, otherwise I'm sure they would have found the holy grail of business software that us foolish dark matter programmers have failed to deliver on for several decades in no time.
I'm being forced by my manager to do this for a client due to a close deadline (the idea is to implement a spreadsheet as interface to make it quicker than a classic web app), lbut they keep asking me to implement advanced features that would be 10 times faster to implement with a regular interface or sometimes not even possible on a sheet. Spreadsheets have a precise use case and it's not to replace web apps.