In the last few weeks, we now have a glut of FF mirror-less players. Yet, here are my personal feelings tongue-in-cheek about all of them:
Sony: Format abandonment when under pressure, frequent planned obsolescence, unproven feature bloat and fine print
Nikon: Poor product decision roadmap (1 series, action camera lineups, aps-c compacts), not quite sure what to release, when and for whom
Sigma: Foveon and accompanying strange colors and ergonomics.
Leica: Niche product line, expensive and target market out of the mainstream
Panasonic: DFD unproven and slow compared to the competition. Not sure of the sensor and 4K60 will be yesterday's news by 2019. Competitors will have a serious head-start with a lens system only somewhat fleshed out by 2020 unless people go with the expensive Leica option.
Canon: Product segmentation, obvious feature omission, technological limitations
Well, it's great all of the Japanese manufacturers have one or more things wrong with their products. I consider Leica Japanese in this context given the Pana-Leica involvement in the SL system. FF is a small enough market to begin with to see so many new players simultaneously surface. I'm relying on Sony to put in at least a good 2-3 years fight in this next era so I can recoup my investment on upcoming work in 2019-2021. I am getting comfortable and don't want to jump ship yet..