I just wrote a long answer and it was eaten by the computer.
I will summarise.
Journeys? Why describe them? Jane herself would have looked surprised and asked "Have you ever been on a journey? well it was like that." We don't describe a train journey in detail, it's a wearisome thing to have to survive. Jane had no idea her stories would be read by people who, incomprehensibly to her, find carriage journeys exciting.
the war; it had been going on almost all of Jane's adult life, she was probably fed up to the back teeth of it. If you read contemporary fiction from 1939-45 from America there's very rarely much mention of the war there, either, even taking into account the fact that America was late to the party. It didn't touch ordinary lives. Equally the war on the continent didn't touch ordinary lives in Jane's world, where the theft of geese from people like the Westons was more important. It was a very parochial lifestyle.
the distance between when the books were written and when they were subsequently set and published means any contemporary comments had to be excised; other than there still being militia for the plot device of Wickham. I suspect that one reason for avoiding newsworthy items was in order to avoid the books being seen as 'dated' or fossilised into any particular period.
the only contemporary occurrences I can think of in any of Jane's books is the anti-slavery subtext in Emma, which is slyly and subtly introduced in such ironic references as 'Maple Grove' as the house belonging to Mrs Elton's slave owning relatives and Miss Bates' insistence that they did not drink coffee. Presumably this, however, was a political stance Jane believed in rather than being seen as a mention of current affairs.
