I'm amazed to hear people still comparing portable Honda's the size of a bowling nag with any kind of diesel genset and ask again: Has anyone actually ever seen or heard of a diesel genset COMPARABLE to the portable Hondas? Not a 10kW Onan that needs a machine space of it's own, but a *portable* that can be stashed away and brough out when or as needed. Say, after the main engine has failed or the solar panels smashed by hail, and you just need *some* power for the short term.
This is like arguing that a spare tire has no place on a car (as BMW, Corvette, and others insist) because they now use run-flat tires. Sure, veyr good, you can go 50 miles and then hope you are at a dealship that actually has your tires available. Otherwise, you're down for 48 hours or longer. As opposed to 15 minutes to put on a real spare.