But otherwise as others have said already, you can use previously generated addresses as long and often as you want and it makes sense for you. Keep in mind that address reuse can have privacy issues. When you give someone your address, this someone will be able to see any previously received coins to that address in the blockchain. The blockchain and transactions recorded in it are public.
I just got curious - some of old posters here often put that in a signature and this is not bothering them at all or is it?
Many are not bothered by it because the wallet address that is used in signature campaign isn't the main wallet but as a means of receiving Bitcoin before it is transferred to another wallet for privacy reasons. Example, I use the wallet address A to receive payment and send the BTC to an exchange for example and buy different crypto or use a service and of course, you must pay a fee before it will received in your main wallet. I have other wallet addresses in my wallet created on electrum which I can decide to use the other wallet addresses or not.