Plasma or laser welders would be very plausible and a nice addition, but you can’t exactly cut wood with heat or a laser. Of course, you would eventually burn through it, but you’d also burn the rest of it and make a mess out of it, and it would take longer and be more of a pain than just using a saw. As far as the mop idea goes, there was actually a thread a while back where a guy made a mod for that, if I remember correctly