can be solo'ed with a large heaping of extra difficulty from the second boss (The Elder) and on

even with prep and back-up gear, you can still get repeatedly killed going back to recover your stuff, or even just while minding your own business and building inside your home when a raid decides to happen

just today, a troll raid, armed with tree trunks, wrecked the house and portal i had in a Black Forest biome that was near 2 boss altars, despite having put up sharp stakes all around my stakewall, lots of core wood I used to build those spikes, and a couple beams, had despawned by the time I was able to sail back there from the starting area

it can be enjoyable, but it's currently frustrating as heck when you're alone, which may not deter folks from the challenge (my respects to you), but it is too frustrating for shameless casuals like me
as of writing this, i've yet to play in a group and hope to soon