If your teeth are 20 years old and if they are completely in the position they should be, if there is no caries, gum disease, no need to be extracted.
Situations that could result from impacted 20-year-old teeth
Infection in environmental tissues
Caries
Creating a tooth decay in the adjacent tooth
Encystation
Disturbing positions by pressing on other teeth
In such cases, it must be extracted. However, even if the wisdom teeth that are impacted or not in position do not give any symptoms, they should be evaluated by a qualified dentist and extracted if deemed necessary. It should be noted that the above situations may not always be symptomatic.