After working in F# for a while if I flip back to something else I'll spend twice as long getting anything done as I'll model my process in my head with tools I

After working in F# for a while if I flip back to something else I'll spend twice as long getting anything done as I'll model my process in my head with tools I don't have access to. I just keep getting stuck, and having to force myself to think without maps and folds and so on. Like any context switch it takes me time to get back into the right mindset and process meaningfully.