I just upgraded an old Dell Lattitude E6410 with 8 gig of ram (2010 era) from 17.3 Core to 18 Core . The upgrade process was kinda slow , probably 1.5 to 2 hours on this old HDD driven laptop . In the end though it completed with zero errors and loaded up just fine without losing any data . All apps seem to work fine . I like the new desktop themes they have added . Browser response times are very good . I use Firefox, Brave and "Opera . All in all I really like the new release and it works pretty well . I would say the only issue on mine is it is a little slow booting up which is once again probably the HDD age and the old CPU . Here is a kudo to the Zorin programmers . Well done .
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If you have the chance to change your HDD to an SSD it will be great for you 
because my old laptop 11 years old breeze better with an SSD, believe me
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