The heat is a weird case. It was their first effects unit and it’s likely that it did far better than they anticipated. I imagine if they had no more Heat mki units in stock and they cannot produce more on current part stock they have left, the upgrade is almost forced if they want to keep producing the heat.
They have a historically bad record in planning parts usage. The sidstation was discontinued because the entire idea was based on already difficult to find chips. The silver boxes had to be upgraded cause they were already having a hard time servicing mki models. And I see bad planning on the heat as well.
Up until the last 2 or so years elektron was a relatively unknown company, with niche products. But it has been mentioned by elektron that the digitakt in a year has outsold the number octatracks sold since the octatrack was introduced 7-8 years ago. This is huge for them, and the success does signify the need to reassess long term plans for their current line up and future products.
I think the refresh to mkii for existing products and the introduction of the small boxes is a result of that. Mkii parts upgrades likely means they expect to produce, sell, and service more units. And I think we are more likely to see another digibox or effects unit before anymore mkii upgrades…
Though, we may see an analog drive mkii before another box