If he is a well adjusted balanced dog...longer time alone in the future shouldn't be a problem. Is he crated now for a decent period of time and is content with that? Is he relaxed when left in the car when you run an errand? if the answer to these is yes, I wouldn't worry.
I would make sure that he is comfortable with a long duration between "potty outtings", and doesn't get used to going out on a whim every time he feels the need just because you are home to cater to that.
Other than that I would not worry unless he is behaving in way now that makes you truly sense it could be an issue.
I would make sure that he is comfortable with a long duration between "potty outtings", and doesn't get used to going out on a whim every time he feels the need just because you are home to cater to that.
Other than that I would not worry unless he is behaving in way now that makes you truly sense it could be an issue.