This whole thing is just a nice reminder to not go overboard and use a 3rd party library when it’s completely unnecessary. I never had a need to use sth like fluent validations when you can do pretty much the same thing by writing the validation method directly in your Dto, it’s a bit verbose but at least it also lets you have more control over the whole thing. Maybe I just never used it on a scale enough to justify the library but it seems completely superfluous, dunno