All these new datacenters are going to be a huge sunk cost. Why would you pay OpenAI when you can host your own hyper efficient Chinese model for like 90% less cost at 90% of the performance. At that is compared to today's subsidized pricing, which they can't keep up forever.
Eventually Nvidia or a shrewd competitor will release 64/128gb consumer cards; locally hosted GPT 3.5+ is right around the corner, we're just waiting for consumer hardware to catch up at this point.
I recently bought a second-hand 64GB Mac to experiment with. Even with the biggest recent local model it can run (llama3.3:70b just about runs acceptably; I've also tried an array of Qwen3 30b variants) the quality is lacking for coding support. They can sometimes write and iterate on a simple Python script, but sometimes fail, and for general-purpose models, often fail to answer questions accurately (not unsurprisingly, considering the model is a compression of knowledge, and these are comparatively small models). They are far, far away from the quality and ability of currently available Claude/Gemini/ChatGPT models. And even with a good eBay deal, the Mac cost the current equivalent of ~6 years of a monthly subscription to one of these.
Based on the current state of play, once we can access relatively affordable systems with 512-1024GB fast (v)ram and sufficient FLOPs to match, we might have a meaningfully powerful local solution. Until then, I fear local only is for enthusiasts/hobbyists and niche non-general tasks.