You'll end up with a portable desktop with bad thermals, impacting performance, battery life, and actually-on-the-lap comfort. Bleeding-edge performance laptops can really only manage an hour, max, on battery, making the form factor much more about moving between different pre-planned, desk-oriented work locations.
I take my laptop back and forth from home to work. At work, I ban them from in-person meetings because I want people to actually pay attention to the meeting. In both locations where I use the computer, I have a monitor, keyboard, and mouse I'm plugging in via a dock. That makes the built-in battery and I/O redundant. I think I would rather have a lower-powered, high-battery, ultra portable laptop remoting into the desktop for the few times I bring my computer to in-person meetings for demos.
Huh? Bleeding edge laptops can last a lot more on battery. M3 16'' mbp lasts definitely enough for a full office day of coding. Twice that if just browsing and not doing cpu intensive stuff.
Even the M4 Max is not "bleeding edge". Apple is doing impressive stuff with energy efficient compute, but you can't get top of the line raw compute for any amount of financial of energy budget from them.
I'm genuinely interested in what kind of work are you doing if bringing m4 max is not enough? And what kind of bleeding edge laptops are we even talking about (link?) and for what purpose?
I take my laptop back and forth from home to work. At work, I ban them from in-person meetings because I want people to actually pay attention to the meeting. In both locations where I use the computer, I have a monitor, keyboard, and mouse I'm plugging in via a dock. That makes the built-in battery and I/O redundant. I think I would rather have a lower-powered, high-battery, ultra portable laptop remoting into the desktop for the few times I bring my computer to in-person meetings for demos.
I wish the memory bandwidth for eGPUs was better.