Upgrades for engine & transmission system are not important , ok then explain why Volvo makes them

In 10 months 5 upgrades October 2018-July 2019
https://www.volvocars.com/uk/support...ftware-updates
Updates including July 2019
Improvement of the engine management system's optimisation.
Improvement of the transmission system's optimisation.
Improvement of the transmission system's optimisation.
Updates including April 2019
Improvement of the engine management system's optimisation.
Improvement of the transmission system's optimisation.
Updates including March 2019
Improvements of the engine control system's optimisation.
Updates including November 2018
Improvement of the transmission system's optimisation.
Updates including October 2018
Improvements of the engine control system's optimisation.