Chessdotcom speaks for itself.
Why do you prefer chess.com over lichess ?
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One suggestion to chess.com is to let the games played in the arena keep going on even if the arena’s time is out. I hate it when I’m winning a game and the game ends. Lichess doesn’t have this problem.
Lichess > Chess.com because of the difference of their goals. Making chess available to everyone is a honorable thing, a huge part of my rapid improvement is lichess's puzzles.
Chess com and lichees are both good!