which do you think are the differences between speech therapists aged 45+ and these others who are 25+

which do you think are the differences between speech therapists aged 45+ and these others who are 25+ I mean, are there any differences from the others in terms of speech therapists, because those who are older have studied what was discovered or whatever at that time, while the young speech therapists who are at this time have could learn more many new things, what is your opinion about this?