I’ve purchased many iPads over the years (ten for myself, probably four or five for others) and I think only 3 of them have been WiFi only. When the iPad mini was revived in 2021, I got it as WiFi-only because I had a 2018 11” iPad Pro with LTE (since replaced with a 2022 11” with 5G) and having cellular on two iPads is almost as ridiculous as having two iPads, but I pay the $20 a month to Verizon to get unlimited data on it (with whatever data caveats that means) and it is worth it for me for tethering if nothing else because the battery on an iPad versus an iPhone for tethering really does make a big difference. And at least twice a week I’m furiously working on my laptop in the backseat of a car en route to a meeting. It’s also killer at hotels when the hotel wifi (even the “premium” stuff) is hot garbage and you need to upload large files for work and also watch non-pixelated content on the TV, meaning that you’re ideally using the hotspot of your phone and your iPad at the same time for different devices.
Likewise, my mom, who I buy a new iPad every few years, always gets the one with cellular because it is often her primary computer. She had an iPad before she had a smartphone and so for her it’s just sort of an expectation.
The one year I did avoid getting cellular on my iPad, thinking I could suffice with using my iPhone as the data source, I regretted it. I don’t know if it is because I’ve had a cellular iPad since day 1 (technically the iPad 3G came out a few weeks after the original iPad, which meant I had to buy two and sell the WiFi one to my now-husband after 3 weeks of use) or if I am just reliant on having connectivity no matter what, but for me, it’s a necessary expense.