Is there any modern examples of dapps? I found that web3js has alternatives of window.ethereum.request({ method: 'eth_requestAccounts' }) for e.g. I wanna to interact with my smart contract from react app using the best practices

use wagmi.sh

but why ethers?

why not

I checked both repositories (web3js and ethersjs) and web3 seems to be more active and supported by the developer community.

i personally prefer ethers because I started with it.
It is your choice

I wanna to use technologies that will survive in a couple of years

what a dumb phrase🤣

if someone can predict what will disappear and what no would be awesome

use what you know better
don't stress yourself with those thoughts

I don't think ethers will be discontinued but activiy decreases now

web3js is updated 2 hours ago vs at October 2022

.

Mhm that's not something you should consider for an interface library imho.
Check both, try to do a simple task with both then choice what you like.
I use web3py (web3js port to python) and ethers.js for JavaScript
But if i had ethers on python i would use that there too

why you can't give the name

those updates don't tell us the real difference

web3 is easier to use if you do frontend, ethers in my opinion is more if you need full manage portals for contracts

web3 + types from ethersv5 and it's best combination