Yeah, the always-on thing is exhausting and it creeps fast. In your next 1:1, say: 'I'm offline after 6pm my time. I'll reply next business day unless it's urgent. In that case please call me' and put it in your email or Slack status. Turn on Do Not Disturb with a schedule and allowlist calls, and use scheduled send so your replies go out in the morning. If they keep texting, leave it unread and batch reply at 9am to train expectations.
