Got a Xeon E5-2690v2 with TrueNAS Scale and a Synology DS418. Having used both pretty heavily over the years I can safely say I’m indifferent. The Synology is efficient; the TrueNAS Scale box performs really well with the added bonus of being able to run Kubernetes and Docker workloads. They’re both sitting in their respective corners, doing their respective things, with minimal intervention.
Thunderbird on desktop for my Gmail accounts and own domain. Built-in iOS mail app for those on mobile. Outlook web interface for work desktop, and Outlook iOS app on mobile to keep work and personal emails separate.