12 channel limit, to higher channel count.

Some protocols like Frsky support up to 16channels, not there is an urgent need for me now, but just wondering why we restrict to 12 channels and not open up deviation to support higher channel count?

When using trims and virtual switches etc in combination with flight controllers, might be of use for some?
Indeed as the main argument, it sounds interesting at the club, to be able to mention that my deviated radio is 16 or 18 channel capable

As far as I understand the number of channels and virtual channels is configurable through defines. For lower resource TXs it make sense to limit the numbers to occupy less RAM. I think that for regular Devo - say Devo 10 it can be bumped. Another problem is there are not so many controls to provide data for all these channels.

The defines are per platform, so nothing prevents you yo boost the number of channels only on suitable platform.