Looking for software, including less free, proprietary style (e.g. visual studio code, spotify):

What are the downsides and upsides of configuring a Debian repository? - perhaps compare with installing from source (download a file and carry out commands from terminal) or even changing distribution 1.

Or at least, what aspects are reasonable to be concerned about when considering whether to configure a repository in order to install new software on one's Debian?

• security: how does one know the software provided by the repository may be relatively safe e.g. the brand image of the distributor
• compatibility: how does one know that the software in the repository is likely to work with the distribution
• manageability: how does one know the number of operations on the computer to actually install the software may be large, also when having to update the software later
• ...