I'm a SW developer from a middle size company (bought 100+ TC licenses

We'd like Tabs to support system variables in their path. Example: Tab named "System32" would point to %WinDir%system32 and the full path would be resolved every time I switch to the Tab.
Proposal: editing manually the *.tab file to change the fixed path for something with the environment variable is sufficient way how to specify the variable path.
Bonus: it would be great it TC reflected change of variable value @ run time without restart needed, but I know it's not easy to do.
Thanks for considering this,
Michal