Where older career changers can have an advantage
Age can help if it shows up as reliability, customer maturity, safety discipline, calm communication, and respect for the learning curve. A 40-year-old apprentice who shows up early, asks careful questions, keeps material organized, and does not turn correction into ego can become useful quickly.
Age hurts when the person wants the licenseable skill without the beginner year. The trade will not skip the basics because you managed people, owned a house, or have a good work history. The strongest career changers use maturity to learn faster without pretending they already know the craft.
Before you switch, build a household version of the apprenticeship plan. What happens if overtime is inconsistent, if the commute is longer than expected, if tools cost more in year one, or if night classes collide with family logistics? A career change is more likely to survive when those frictions are named before the first exciting application is sent.
The right plan should still make sense after the excitement cools and normal bills return.