Exactly this. I realized that a lot of how I use objects fits in nicely with FP patterns, but when I started looking into FP "best practices" the number of time

Exactly this. I realized that a lot of how I use objects fits in nicely with FP patterns, but when I started looking into FP "best practices" the number of times the best practice is "Replicate this exact behavior from a 'more functional' language, even though your language has idioms for that" is astounding. I decided I'll just keep programming without side effects, if that's what FP is.