Among PMs who moved from AWS to another firm, have you a) left the cloud business entirely, b) left cloud business only in the first year and went back to cloud, or c) stayed in cloud business but worked for a different sub-product (ie. AWS S3 to Azure compute)?
Unless you're director level and above, nobody cares. Even at top levels no one cares (Ex: Kurian). Me and my teammates have moved between azure and AWS both directions for similar issues. No problems