Following up from this thread:
I have a home client that has an old Leviton DHC system which uses X10. No one seems to support it anymore although you can still buy equipment on eBay and find manuals etc using the wayback machine website. Everything still functions and given info gleaned from the above with some simple additions thread can be extended to work with more modern devices like HE. The good news is I and my electrician were able to help my client with reprogramming the controller and handle a few other things so they are happy (2 times - got what they wanted and did not have to pay for a new system).
It occurs to me that this is a perfect example of how I want my HE system age over the next 10-20 years. Maybe extremely outdated but still functional with the possibility of interfacing with the new stuff.
Could my client upgrade? Sure but is it really necessary given their simple use-case (essentially lights on when dark, lights off when light + some minor things).
Do we really always need to keep upgrading? As a techno-geek I mean I do sure it's my hobby/work... but the average homeowner? Where is the line between good enough/meets requirements and overkill?