I fully expect (and look forward to)
@Andy Ful schooling me on this, but though MS Defender has excellent protection and keeps improving, I find Kaspersky has a longer track record and more of the kitchen sink. They have world class signatures, some of the most responsive zero day -> cloud propagation time, and one of the best behavior blockers on the market. On top of all of that, it’s paired with fairly good anti phishing and web filtering / IPS signatures.
Very few vendors bring all of that to the table at an acceptable performance.