It really kind of depends on your luck with the hardware. I've used laptops as servers for durations of several months at various points in the past and had no particular problems, just make sure cooling is adequate.
You might consider setting up a Proxmox node if you're interested in virtualization at the machine level (i.e. having several virtual machines running on one physical machine, which can reduce maintenance headaches and make experimentation easier as VMs can be snapshotted, cloned, and easily replaced)