T-20 format is definitely a lot more entertaining in comparison, but the test format is special in its own way.
Once in a while we get a competitive series such as the Ashes, Border Gavaskar or the Trans-Tasman. But 90% of the test series nowadays are uncompetitive and one-sided. Only the pig-4 can afford to play test cricket nowadays, as top players are being poached by dozens of franchise T20 leagues around the world. And even among the pig-4, New Zealand is showing fatigue during the last couple of years (and that has a lot to do with the retirement of Trent Boult). Overall, I don't feel very optimistic about the future of test cricket.