I only used a hydro a couple of seasons. Now, my mechanical splitter is a chainsaw and noodling for those I can't readily hand split. The only other type of mechanical splitting I am almost interested in now is milling, as the end product is worth way more than firewood.
If I don't sell any, I am at least 5-6 years ahead with what I have now, so..meh...hand splitting is fun for me. Now switching to bulk firewood sales, things would change and it would take a larger investment in equipment and paperwork time etc..not that interested in that.
Once I can't hand split at all, perhaps then with a small splitter...