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8GB RAM on M3 MacBook Pro 'Analogous to 16GB' on PCs, Claims Apple
(www.macrumors.com)
This is a most excellent place for technology news and articles.
ram is meant to be used so high ram usage is not really any indicator of efficiency. if ram is slow and application is being swapped in and out frequently then it will be laggy but high ram usage can also be an indicator of a snappier experience.