Future Accuracy Expectations

[Otaru1987]

I set my SD43 on Sunday July 23rd using the clock on the Watchville app. Watch gains .25sec/day. If I rest it at night with the crown up is losses .25sec during the night. It is spot on after two weeks. Best accuracy of any watch I've had. Will the watch maintain such a high degree of accuracy in 4-5 years or will it start to waiver before that? Just curious if I should not expect this to continue.