A lot of assumptions in here that they're reading my clearance differently based on the airplane. I haven't picked up a clearance in a light airplane in probably a decade, but yeah, I'd venture to say most people aren't picking up voice clearances in a jet with 3 comm radios, an HF, and CPDLC. I'm sure there's plenty of airliners flying around with stuff deferred or flat out not offered. Just seems like a weird thing that was standard for a while until it apparently wasn't, not to mention our clearance review includes the "expect FL (xxx) in 10 minutes" or whatever. Or at least 99% of people brief it that way and look a little confused when a voice clearance doesn't include it.