"i will not promote"When your business is scaling rapidly, but an early co-founder is no longer keeping up, how do you handle it?

"i will not promote" I have a co-founder who has been with me since the very beginning of our startup journey. Now, our company has grown to $20 million ARR, and as our **Head of Engineering**, he is starting to show clear limitations—both in cross-functional communication and technical capabilities. For those who have faced similar situations, how did you approach it? What worked (or didn’t work) for you? Looking forward to hearing your thoughts!