Hello Gunoi Nare
You wrote :
"
What I might suggest dough, is to make the new library back compatible with IV. "
"It would be a shame to dismiss the large group of EXpers if they can not use these librarys. "
Why do you think t that? LTspice XVII libraries could not be used with LTspice IV ?
A priori, it has nothing to do with? a new GUI? or a new Spice engine ?
You should ask directly LT ?
Regards
PhB