Lanefan
Victoria Rules
Curious: how, in your view, does 5e not support heists?Let's try to start over. 5e offers no support for heists. Other systems do. What say you?
I mean, it has several classes that have built-in skills and abilities that would suit heisting; it has rules that allow for detailed resolution of various elements within a heist (e.g. climbing, lock-picking, etc.); it has guidelines for mundane-but-essential elements such as encumbrance and loadout, and so forth. After that - as with any RPG - it comes down to what the GM and-or players want to do with it.
What 5e doesn't support is Blades-style Flashbacks; instead it rather forces the players/PCs to do their planning up front, but to me that's a feature rather than a bug.