If you touch type then you can avoid bottoming out the key when you have a good mechanical keyboard. This way you can avoid the hard slowdown at the end of the keystroke which makes finger joint fatigue smaller.
Bottoming out is the impact when a key reaches the end of travel. The problem with many (but not all) cheap rubber dome keyboards is that the actual key-press is detected only very near the end of the total key travel available. So very soon after key-press registration the key cannot move down any more.
E.g. Cherry MX brown switches register key-press just after the tactile bump somewhere before 2 mm of travel down. The actual bottoming out happens at 4 mm. This gives you a bit more than 2 mm to stop pressing the key and avoiding the impact of bottoming out. I do not know any rubber dome keyboard which gives you so much length to stop pressing the key.
If you do not type a lot then there is no need for a mechanical keyboard.