For a while I did have an iMac at work, iMac at home and small laptop for whatever. But it was too much hassle.
Additionally depending on OS / hardware similarity at each end you might even be able to make it bootable and carry your toolset everywhere too.
Two decent desktops are each going to be individually more powerful than a good, expensive laptop.
But realistically we're probably not working on a fixed budget. My job is how I get almost all of my income, so I will do whatever is necessary to continue being able to do it. If that means spending more money on another computer so be it -- what that money is buying is less hassle from having to move a computer around twice a day, and reducing risk of forgetting it or not having it at the right place, as well as reducing risk of damage or theft in transit.
I don't pay for these extra computers anyway, though. I simply have two work laptops. The refresh cycle here is two years long, and the first laptop I had was a top spec 15" ~2014 gen Macbook Pro, so it's still way more than adequate. I simply didn't turn it in when I got another laptop two years later, so now I have two -- the powerful Macbook Pro at home, and a lighter Chromebook at the office I carry around and primarily use in meetings (nothing comes close to touching my monster of a workstation in performance anyway).
It's something I do semi frequently currently and it's totally do-able, but there's enough friction that I'd rather not ever worry about it. Hell, I'd rather not have a travel laptop either, but as mentioned I don't want my high end machine to be taken with me.