I have to agree with Al & Dale - platforms introduce a couple of extra hazards into the workshop. The spindle height / lack of height adjustment on stands issue is simply another instance of lathe designers & manufacturers cost savings / poor design that create hazards for wood turners.
Turners generally are "oldies" so we should be looking at creating a workshop / shed environment with less hazards - not more - so get rid of potential slip, trip & fall hazards. Sudden changes in floor surfaces, especially low steps of a few inches in height are not not very safe from a fall prevention viewpoint. Combine the low step with a curled up edge on a comfort mat & the hazard level increases again.
http://www.safeworkaustralia.gov.au/...ct%20Sheet.pdf