I agree - best of both worlds! I have a 25knot 'rule: sub-25 it's Wingfoiling. 25+ it's Windsurfing!
I love Wavesailing and Speedsailing and after 40 years of windsurfing I still get twitchy when the wind starts to crank and want to sail. Most of my kiting mates have stopped kiting and just go Winging now. (But kiters always were trend followers

)
Also, my learning curve at Winging has been very slow and I'm still an 'intermediate' - I think the issue is having to un-do 40 years of windsurfing muscle memory!? When I windsurf I'm an 'expert' so it's nice to go into that mode and experience 'flow-state' - especially when you are 50-mumble years old.
Still love the sensation, power and physicality of windsurfing - it feels like a sport and your muscles burn and heart rate is high and you are moments away from disaster if you lose concentration.
My smallest wing is a 4.0 and I don't feel the need to get a smaller one as if it's too windy for the 4.0 then it's about 6.2/5.3 sail weather. My biggest sails are 6.7 Severne Overdrive and 6.2 Severne Blade Pro - so quite small sizes for my big sails - which is good as when I bust them out I'll be lit-up.
The other thing is that I am Winging a lot as the conditions in Auckland are ideal - so I look forward to a windsurf session when the wind cranks. Besides, I have 6 waveboards, 2 slalom boards and 9 sails to choose from and that have all been recently upgraded to keep me stoked on going windsurfing.
Foiling is amazing and unlocks so many new experiences and will be the future - but sometimes I just wanna go for an old-school blast and that puts a big smile on my face