Cubase is unable to carry busy projects

Are there any other users here who are suffering from the software’s ability to Work with Plugins that consume more processing power and that way it Reaches overload very quickly.?
Does anyone know if this is because the base of the software has not been Upgraded and only additions and upgrades are added to an old " engine "
For example, the amount of sends per channel is not increased,
If the Software was upgraded from the base it would have already been Increased…

It’s because many plugins are processor hungry. It’s not Cubase