McLaren has been in a rather good shape recently, scoring a podium in the exhilarating Brazilian Grand Prix after Lewis Hamilton was given a penalty for making contact with Alexander Albon. Also, this year was the first 100-plus points scoring season for them since 2014. They were barely even midfield runners from 2015 to 2018, which triggered multiple "meme" worthy events such as Alonso's infamous "GP2 engine" rant in the Japanese GP of 2015. However, it was Alonso, being the ultra-talented and skilled driver he is, who squeezed the machine of it's power and ability to even put McLaren in midfield contention.
This year, with a fresh new driver lineup, including former Red Bull junior Carlos Sainz, and rookie Lando Norris, McLaren started to thrive within the midfield once again. The season itself hasn't really started well for them, and they also had plenty of reliability issues that caused them to retire the car, but soon, they got up on their feet, and scored a lot of valuable points and eventually winning the "best of the rest" race by scoring 4th on the constructors championship.
Lando and Carlos are both hugely talented drivers and well liked among both the driver and the fans. They gave McLaren a boost and looking at the growth they had this year, and the young driver lineup, who knows what McLaren is going to bring to the table on 2021.