Just a little hope for the future of the game. I thought I heard that the maximum level of our characters will be 10. At this level the druid can use "Conjure sylvan beings". I hope this spell will be available. And I would love to meet dryads, pixies, and treants on our adventures.
I would very much like that.
Last info we get was that max level will be "somewhere abowe originaly intended 10" ... but nothing closer so far.
Most people presume level 13 tho.
So, most likely, our wizard Tav will never get "Wish"

My GUESS would be that spells may just be the deciding factor on where levels stop.
They are going to 11, may as well do 12 for another Improvement option (to make fans happy).
13 would open up level 7 spells.
I would be grateful for anything above 11, but 11 is what I will plan for to not be disappointing, yet maintain the opportunity to be pleasantly surprised.
At level 11:
Fighters get 3 attacks
Bards get 2 level 5 Magic Secrets...Archers with 4 attacks, ect (from level 10) and a level 6 spell
Rogues become Reliable and have 6 SA dice
Monks get a Monastic Tradition and their fists are d8
Rangers get a Conclave Feature
Clerics get Destroy Undead and a level 6 spell
Druid, Sorcerer, and Wizard get a level 6 spell
Paladins get Improved Divine Smite
Warlock gets a third spell slot and its first Mystic Arcanum
Barbarians become even harder to kill: Relentless Rage
All in all...not bad

, and plenty of reasons to not multiclass.
BUT...if you want a wish spell then...mods will take you there (What? Level 17 is it?).
Tav the "Archmage of Faerun" arrives to kick some serious hinney! Bows in awe .