I do not see any problem with sharing word of another Lisp option in this space as long as it does not turn into a drumbeat. But what do you mean by "goodbye Arc"? It does not sound like you tried it. As for newLISP:
newLISP does not support sharing of subobjects among objects, cyclic structures, nor multiple variables pointing to the same object. Objects are (physically) copied when stored in data structures or passed to functions
The only times I've seen folks here talk bad (or really even talk at all) about NewLISP is when someone specifically asks about it. I don't think anyone here is out to destroy NewLISP, or to stop people from using it. If it works for you, then go for it!