Just picked up a MX Master 3S recently. Big thing I love is that you can use it on up to 3 devices, so I can have it on my MacBook for work and then click to setting 2 and switch to the usb dongle on my gaming PC - no need for extra mice/cords!
for me having a separate Anker usb charging block (5 port, 40W) is great to minimize the things connected to my work macbook (mouse charger, airpods charger, wireless charging pad …etc) and a good laptop/mouse mat (Razer Gigantus) has been a great purchase too (provides a nice mouse surface and little more comfortable than a cold desk)
My first computer was an IBM EduQuest 486 SX/50 (https://www.ardent-tool.com/EduQuest/EduQuest_55.jpg) - great memories of taking that apart and learning about how things worked (glad my parents didn't know what was going on after spending $2000 on a computer for 'school work')