Semi hydro is just another option. It works for some where bark works for others. Try converting some orchids - a few different genera. Don't convert them all just in case you're not happy. Then assess what are the pros and cons for you and your situation.
For me, as an indoor home grower, S/H is among my favourite methods. Bark would be my last choice for a new orchid but for a lot of people it is their first choice. It's just another option and the orchids will usually be fine in either. Just go with your favourite method. I now avoid switching to S/H in winter but I think repotting in winter is not usually a good idea in any media (unless your orchid is out of season and becoming active at that time).
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