But it's MT they do what they want and listen to customers when they want. I get it they can't tick everything on everyone's wish list.
For price vs performance they are great it just seems strange they are launching devices without enough ram for wave2 when it's there in ROS7
I think the better problem is they need to get v7 out since that has a kernel that supports Wave2 drivers. My guess eventually squeeze Wave2 on to the XL, but we'll see but still if/when for brand new hardware. Right with WW2, there is no CAPsMAN so you'd have that problem even if XL support Wave2. I run WW2 on a couple devices, totally works, but it's really basic options and has bugs (I can't set MTU to anything but 1500)
While your customers say they want Wave2 support, in reality they should want Wi-Fi 6, which is 802.11ax – that offers way more benefits than going from ac to Wave2 ("Wi-Fi 5"). Wi-Fi 6 is something the XL will never do however. Wave2 just allowed bigger channels and other small fixes over 802.11ac. Wi-Fi 6/802.11ax different modulation, OFDMA, more like LTE so it handles congestion better. Wave2 doesn't offer much on that front over standard 802.11ac.
With the new kernel in ROS v7, more hardware chipsets are available, so imagine they'll be Wi-Fi devices support AX from Mikrotik. But I for one won't be touching the XL.