Visited Istanbul in September 2021. The city has left very positive impressions about itself. Many attractions. Who is interested in good and cheap dentistry, as well as hair transplantation? Prices are really low.
The weather for autumn is comfortable and pleasant for moving around the city. Food prices are reasonable. The only thing that annoyed me was the sheer number of people. There are many places in the city where you can just walk and relax.
Lots of green areas, parks, squares. Extraordinarily delicious sweets. This city is for those who love all kinds of excursions, shopping. The rest is not beach, but the beaches are present, mostly paid, because the coast is very rocky.
If you want to swim, then you need to go to the Asian part of Istanbul. There are fewer people in remote parts of the city, since the main crowd of people is in the European part of Istanbul, and in particular tourists.