Combining C9300-M with MS225 and CW9164I with MR36 into same Meraki network

[BlakeR1]

I currently have a building that has existing MS225s and MR36s that I want to add C9300-Ms and CW9164Is to. Is this a bad practice? I haven't found any documentation on combining the new equipment with the old equipment. Would there be drawbacks in combining the equipment into the same Meraki network (if that is possible)? If you can't combine them into the same Meraki network, what would be the drawbacks of creating two separate Meraki networks? 
 

[alemabrahao]

• In theory it is not recommended, but in practice it should work well.

[BlakeR1]

Are there any discussions or documentation on this matter? Also, would you recommend two separate Meraki networks or a combined Meraki network?

[alemabrahao]

This document explains a little about having access points with different firmware, which happens when you have older and newer models on the same network.

MR Mixed Firmware Networks - Cisco Meraki Documentation

If you have separate networks you’ll need to switch between networks in the dashboard to manage and monitor devices.
Client tracking becomes more difficult, especially for devices roaming between APs in different networks. 

This discussion below isn't exactly about that, but it might give you some ideas.

Solved: Networks & templates per device type vs combined - The Meraki Community

[PhilipDAth]

I would have no issue with mixing the switches for the access layer.

I would tend to group the MR36s in one location and the CW9164s in another area, rather than having them intermingled.

[Ryan_Miles]

I agree with this approach. Generally it's not recommended to mix APs of different generations in the same coverage areas. Clients typically have roaming behavior mechanisms built in that prefer better/faster wireless protocols. An example of this can be seen in the Apple roaming doc (selection criteria section).

There's a risk that if you mix different generations of APs in the same area clients might prefer a "better" protocol (ie. Wi-Fi 7) instead of connecting to a better quality connection from an older generation AP.

From a pure dashboard perspective all of those models of Switches and APs can exist in the same combined network.

[BlakeR1]

Thank you everyone for taking the time to respond to my questions!