The downside of the drain is the temptation to never remove the anode rod which DOES deteriorate when doing its job.
There are bits of anode; calcium deposits and rust inside the heater that accumulates and circulates in your water system. If you don't pull your anode and just drain the water; that crud stays behind; eventually clogging a faucet.
I will stay with the tried and true method and pull the anode and inspect it; flush out most of the bits; and reinstall it with Teflon.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW