$15k or $50k is pretty cheap all things considered (a year ago it would have been more expensive, one person can spend that in a month or two)

I bought my spark and the models have already improved in that time (qwen3.6, speculative decoding 2x tgen, diffusion gemma 4x tgen) and I expect this to improve. Look out another 2-3 years, local is going to be very competitive.