Follower Robot Count - infinite research

[skydivertricky]

Is it just a bug, or does the infinite follower robot count research not follow the exponential cost like other infinite researches? It appears to be the only one that uses all 7 science bottles but because it only takes an extra 100 per level, it doesnt really take long to research,

I want to fully stress my 1k spm factory and this is the only tech that can do that. will it get more expensive in future?

[JimBarracus]

https://wiki.factorio.com/Technologies#Pricing_formulas
the cost for follower robot count is not exponential

but you can use the research queue

[skydivertricky]

I understand that, but that seems out of step with the others. Will it be changed in future?

[Pandrosos]

Mining productivity is also linear progression. I can only surmise it's because extreme levels in these two are less overpowered than in the others. Conversely the requirement for artillery firing speed goes up even more rapidly than most.

Follower robot count is the sole infinite research required for an achievement, so the impact of changes on that ought to be considered.