Here’s a concise feature idea for — aimed at producers who want to use Serum on a desktop and laptop without constantly deactivating licenses.

This is fully supported. You can authorize Serum on both machines. You simply log in to your Xfer account on the second computer, download the installer (or use the Spitfish/Transfer utility if you have the full installer), and authorize it using your credentials. There is generally a limit to how many active authorizations you can have (often cited as two or three active machines), but for a standard two-computer setup, you are well within the terms of service.