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Can use Scala to gradually transition away from java - convert code module by module, interop just works, until eventually no java left, can then compile instead as js, native or even wasm (i recently tried this for my climate-system model which evolved from old java). Also, btw, made in europe, not big-tech, and scala3 looks more like python.
pH 7 being neutral only works at STP (lab temperature). Actually the dissociation constant Kw of water increases a lot across the normal range of seawater (0-30oC), so in tropical seas there’s a lot more of both H+ and OH- around. I’d imagine that molecules of early life could be stable at some temperatures - i.e. in some regions, while not in others.