The biggest worry for sure is a Prem club coming for him, especially because whilst we have big club (or big enough) potential, it still wouldn't be great to be a manager of a club run by Lai. Moving to a club more likely to back him solidly in the transfer market and at a higher level, would obviously be very tempting.
I hope though (and really do want to believe), that he knows he is on a path to create something really special this season and holding on and seeing us promoted from where we were could well lead him to a top 1/2 appointment in the prem, as opposed to a relegation fighting team.
We only need to look at Howe and his time at Bournemouth to see that this can lead to a prime appointment such as he has currently. I hope he takes a leaf out of this example, gets us promoted and sticks around a season or 2.
Oh and I freaking love this guy, I can't believe how much he has reinvigorating my passion in this club