No new Logitech MX master 4, but upgraded MX master 3 with logi bolt : r/MouseReview
Logitech MX Master 3 Review - RTINGS.com
Ranjit on Twitter: "Just ordered Logitech MX Master 3 Mouse, it's a premium mouse been using the MX Master 2 for about 2.5 yrs but 4 months ago it went bad. I
Logitech MX Master 3 for Mac - Advanced Wireless Mouse
Logitech MX Master Review: Best Mouse for 2021 - YouTube