I have developed on a MBP 15" 16GB with Parallels for 4 years with hardware update a consideration. I am almost always connected to power when working, so it's the mobility of a laptop that I require rather than battery life.
Seems a linux laptop with 64GB / 128GB RAM, VMware Workstation Pro and VMs with each required OS for support / dev / testing makes most sense. Base services for dev EG DB would either be installed as a VM or a container on the base OS as access would be common to all VMs when running / testing / support.
Which laptops offer 64GB / 128GB to suit the above?
What is the warranty period, base period and extension max period? EG 1 year with option of X years.
Which linux OS should be installed on the laptop? Workstation type may be too resource hungry while server type may not function too well for stated purpose.