Things break under use, and I use my winches. Winches wear out and winches age and weather. They are an expendable. Access for PM and ease of PM are important. Off the shelf available parts are important. The ability to reach out and not have to reset your line mid pull is important, especially alone. Warranties are nice, but, like the plotter in my office, I need it to work when I need it to work and waiting for low volume custom production run parts isn't going to get me there. My 110NAS came with a 9000lb winch in an easily accessible location. If Ineos needed a custom winch, they simply forgot it during the design phase. oops.
There are some short drum winches out there but we'd need dimensions, mounting pattern, and a clockable control handle on the proper side.
Portable winches are a terrible idea. You have a 100 pound lump you need to securely fasten in the already small load bay so it doesn't kill you in a crash, and it'll end up buried under your other gear, which you'll have to hope is accessible in the orientation you're stuck, then you'll have hope it's mountable in the orientation you're stuck. I don't really consider those units a serious offroad option, they belong on service and construction trucks. I have a custom rear bumper for my lx470 that houses an 8000lb Mile Marker. I've actually used that more than the front unit. I'd do that again before I'd carry a portable in my hatch.
I'm not in an area where I need to worry about crash engineering for a steel aftermarket bumper and I can easily design it, but, that now segues into ..... spring availability, and all that other handling BS. It's amazing how you can really feel the affect of all that weight when it's too far out front. I really just wanted to check boxes on an order form.