As
@HSIHP and I indicated, the newer Airs do have the dimples my friend, it's not just on the new Solo 2.
I used to just raise the stem a bit, but with the Air it's so tight (giggity!) that it made very little difference IME. Then again, I noticed a somewhat different airflow with the Air, it felt better than my Solo in one way, but worse in another (due to the tight seal). Vapour was slightly more diluted with my Airs than the Solo.
I wonder if the new Solo's (1) will also get these newer style ovens with dimples, but my guess would be yes.