At the moment I am using Sony A7 III I was looking for A7R IV for the extra MP (always useful, when you need a tight crop with extra detail), but I think the best option is to wait and see what will happen.
Well, as all we can notice the prices are going up. Every new model is more and more expensive.
And yes, £6500 is quite a lot, I must admit.
Not sure about the others, but I am working with my camera, this is my main official job and what I do for living.
Having one body for my photo and video work and being able to get high class stabilized footage is very very tempting for me (Talking to myself about Sony A1)
So, may be a good investment in the future (if it deliver what it is promising)
The problem for me is not the investment, the problem is the current situation in UK/world. My models are not able to travel, so my work is almost 100% down, postponed or cancelled.
Once the current restrictions are lifted (hopefully in the next several months) I will think about it (A1) and meanwhile it will mature a little and we will have more actual/real unbiased reviews (which is more and more difficult with these paid youtubers that are praising everything that they are paid for).
Really, really nice photos! Well done.