All-Time Video Game Console Sales List:
1) PlayStation 2 (PS2) - 157,680,000 (155,000,000+ according to Sony) Mar. 31st, 2012
2) Nintendo DS (DS) - 154,900,000 (154,020,000 according to Nintendo) - Mar. 31st, 2021
3) Game Boy (GB/GBC) - 118,690,000
4) PlayStation 4 (PS4) - 115,787,816 (115,900,000+ according to Sony) - Mar. 31st, 2021
5) PlayStation (PS1) - 102,500,000 (102,400,000+ according to Sony) - Mar. 31st, 2012
6) Nintendo Wii (Wii) - 101,640,000 (101,630,000 according to Nintendo) - Mar. 31st, 2021
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7) Nintendo Switch (NS) - 88,136,444 (84,590,000 according to Nintendo) - Mar. 31st, 2021
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As mentioned in the OP, the Switch has now passed 88 million lifetime sales and is now less than 2 million units away from 90 million - Which it should do within the next 5-8 weeks.
The PS4 itches closer to 116 million lifetime sales, which it should do in the next 9-12 weeks.
Hardware Comparison Threads:
Current Thread
Is Hardware Getting TOO Powerful?
Older Threads:
PlayStation/Xbox/Switch: 2022 Edition
PlayStation/Xbox/Switch Hardware Battle: 2021 Edition!
PlayStation 4/Xbox One/Nintendo Switch: 2019 vs. 2020
PlayStation 4/Xbox One/Nintendo Switch: 2018 vs. 2019
PlayStation 4/Xbox One/Nintendo Switch: 2017 vs. 2018
PlayStation 4: 2015 vs. 2016 vs. 2017