@obrhoff if you plan on commuting or traveling with the laptop, I think the light laptop plus beefy desktop option is best. I remember upgrading my main laptop from a 10 year old, 2.5kg chonker to a modern 1kg ultralight and how much nicer that thing is to carry in my backpack now.
A secondary plus is that in the age of thunderbolt, docking solutions all suck, especially on apple devices (poor display output support), and with the desktop you might not have to dock the laptop.