For me I always go cellular. Sure it costs about 20 bucks a month for unlimited data. But for me I don’t like using public WiFi. I’m on the go a lot, and with my job I’m able to use vpn and do my work wherever I am. I could use a hotspot but I find that they are slower and drain the phones battery which is not ideal when I’m on the road.
I’ve had cellular iPads and WiFi only and i find that when I have a WiFi only iPad I keep wishing for cellular.
If you can afford the extra $150 for a cellular iPad then get it, unless you only use the iPad at home, and never take it anywhere, you will end up wanting cellular at some point. And with esim on the iPad it’s super easy to purchase prepaid data.