Yeah, short and specific is my instinct, too - like two or maybe three things max at a time. But I feel like probably putting more things in a letter would be okay. I also have a chance to lay out my reasoning more carefully.

And thank you for the encouragement. <3 To you, too. As I saw someone say on Twitter, it's gotten so bad that millennials are making phone calls. Sounds about right! We're an entire phone-avoidant generation suddenly having to pick up the knack in a hurry.