While Dual-Booting has been mentioned if you’re using APFS you can apparently create a “shared” volume where free space doesn’t take up any actual storage like it does with regular partitions. This avoids one of the major pains of dual-boot if you don’t have tons of storage.
(last post on this I promise. I figure this topic has grown large enough and any new Metal Support discussion should probably move to an ‘alpha2 released’ topic.)