+1 for this also.
Within our previously used system, certain asset states did not count towards your license count. This was very handy for those assets which had been stolen / lost / disposed of etc. At the point we switched over to Lansweeper we had 8000+ assets which were these states, and we would've liked to import this data into Lansweeper to retain the history.
Instead, moving forward with Lansweeper our plan is to have scheduled "offloading" of assets, where we will export assets marked as disposed to excel, and delete them from Lansweeper. Otherwise you will have an ever increasing Lansweeper license asset count, whilst your company has the same amount of "in use" devices. Very bad for larger environments where assets are archived, replaced, and disposed of on a daily basis.
It is a real drawback of the system, and seems to be a real step back from Lansweepers typical attitude of a "single source of truth".