Every Day austronaut did show though that even theoretical aerospike engines are not a good choice if you don't go single stage to orbit, and even with aerospik

Every Day austronaut did show though that even theoretical aerospike engines are not a good choice if you don't go single stage to orbit, and even with aerospike engines, an SSTO is worse than a multi-stage rocket, especially if it can be (partially) reused like the falcon.