I have had several wishes for longer chapter length, but let me tell you a story. I have had several chapters get swallowed by screen freeze, requiring hard shut-down to get out of, and rescued several more from like fate by waiting it out, in one case getting a blue screen of death that had the resurection clause "push any key" and a chapter rose from the dead.
I have gotten frusturated, but if I had more invested, I would not want to reconstruct the lost chapters, and I have been known to allow stories to fall into oblivion, such as We the Wall of us. I let that one get too silly, and divided my characters apart, losing all cohesiveness.
Also, I will have you know that this sick ailing magic typing box I am using right now, my back-up plan, is the same one I mention as making clicking noised on shutdown, and I can't re-open any word-pad documents I now create. The old ones work fine, but not anything I save now. I have to write, online spell-check, and post before I get a freeze screen.
Trust me, better I keep to short, replaceable chapters.