I enjoy rereading post cards sent from friends and relatives and reminiscing with some that have been returned which we sent.  As part of decluttering I have been looking through the thousands of postcards that I have, including dozens sent before the first world war when the stamps cost half a penny (480 stamps could be bought for one pound) and the cost increased only once until 1957 .Postcards and letters could be received the same day as they were sent and several cards make suggestions to meet that evening even when posted about 40 miles away. This sender, Harry, sent several from North Wales as well as Oxford and other places mainly in 1906 and 1907.
News has been announced of the cut in postal deliveries with the removal of second class deliveries on Saturdays and reduction of deliveries to two or three days a week. In April the cost of second class stamps will rise to 87p and first class to £1.70 marking the sixth rise in first class stamp prices in just three years and over 124 per cent more for a 1st class stamp in 2020.  We can no longer rely on an efficient post and important hospital appointments have been missed by delayed post.  Not all communications can be done using technology and greeting cards will decline even further.  Britain will probably follow Denmark's state-run postal service, which is to end all letter deliveries at the end of this year, citing a 90% decline in letter volumes. 
We don't spend time searching now on holiday for stamps and postboxes to send numerous postcards but rely on instant photos sent on the phone.  However I do like to send cards and letters for special events so will still buy a few stamps.