In general I tend to forget to lift when I am supposed to, and only do when I need the finger again
The bad news is that 10 isn't the limit.
It's just something the composers do to make it more difficult for us I sometimes mark with pencil the duration of different voices to be able to read them easier while learning the piece. If sight-reading I usually make quite a few mistakes with them, but I guess those who are really good readers can just get them right the first time.In general I tend to forget to lift when I am supposed to, and only do when I need the finger again
That can't be right. Most pianists have 10 fingers.