Sounds like in your third scenario you possibly should have given that team an EOL date on support for their special use case from the beginning. If it was an o

Sounds like in your third scenario you possibly should have given that team an EOL date on support for their special use case from the beginning. If it was an open source platform deprecating support for a feature they use, then they'd make the time to implement a fix. But since you're part of the same org they're able to indefinitely delay when they have to do additional work, but at the cost of your team constantly having a slightly higher workload.