Well, they're still in use. I've encountered 3 in the last 5 years of consulting. Just because your startup doesn't have one doesn't mean they don't exist in the manufacturing world. Are they ubiquitous? No. Are they rare? Depends on the industry.
The question isnt whether such cases exist, but instead whether they actually need c++26 and what the downsides are to everyone else if c++31 or whatever is still constrained by it.
Perfect! The standards committee will be able to reference this reply the next time they justify eye-bleeding syntax instead of having to go mine Usenet. Thank you.
And the standards committee will be correct.
And what C++ version where these systems on? Have they even made it to C++11, let alone C++23?
When you say they're still in use, do you mean AS/400s or digraphs?
AS/400s
I have to ask, do you actually mean AS/400, or IBM i? Most current development for IBM i is done in PASE. I work in IBM i, and nobody I know is still writing C++ for the ILE. I imagine most of the ILE C++ is in maintenance mode and probably not using anything as modern as even C++20.
To be fair, idk about the software side of it. I just had to consider that they actually existed and were running stuff in the environment. However, one was a VM, at an auto repair shop, believe it or not.
Okay, but how many of them are going to have new software running on them built using C++31? If the toolchains are all stuck on C++11 (or more likely, C++98) then it doesn't really matter what C++31 will or won't do.