People are weird ... I'm one of them ... I've ridden manually adjusted valve train motorcycles for 5 decades. Never thought twice about it, or the occasional adjustment ... but from even my teenage years ... ohhh Solid Lifter ... gotta know your stuff to run one of those
On motorcycles I've cared for solid lifters from cam in block flathead, OHV, OHC with rockers, OHC with shim and bucket.
Does an automotive solid lifter have any kind of spring seat for the pushrod at all? Something that keeps the "oil to pushrod" mating surfaces in contact on the base circle?
Just wondering if the solid lifters might fail less because they have a positive clearance during which they can rotate, whereas hydraulic lifters will always have some amount of pressure on the pushrod seat that might make them more hesitant to rotate.