The M1 Mac mini starts at $699, and it has the same performance and memory management capabilities as the pricier M1 Macbooks, and it also has a fan that is missing on the M1 Macbook air. Related: Best External SSD for M1 Mac mini in 2021
If you already have a laptop or a Macbook and are looking to upgrade, I would personally recommend you to buy the M1 Mac mini and a great 4K UHD external monitor because you can still save money if you do this instead of buying a MacBook Air or a Pro. Thankfully the M1 Mac mini is more than powerful enough to handle not one but two 4K UHD external monitors.
4K monitor for the M1 Mac mini is a great way to enhance your experience for both productive tasks and entertainment purposes.