I have done also some research on this but I am still unsure about the benefits of using a multisite network, especially when it comes to SEO. Let's hope someone can help us with this and in case you find some useful information about this subject, share it here. I will do the same.
I read somewhere that too many plugins can sometimes affect the performance of a website, due to plugin conflicts, the way they were coded, etc. I am not an SEO expert, so I am not sure about the veracity of this argument, but I would like to know your opinion about this.
In case there is some truth in this argument, I thought about creating a multisite network in WordPress using a subdomain configuration - as I read that these are treated by search engines as different sites, so, the performance of one site will not affect the others.
So, basically, my idea would be to create 3 sites within one WP network (my root site, the e-commerce site, and the LMS site). However, only my root site would be used as a storefront to generate traffic. This would allow me to focus only on the SEO of my main site.
What are your thoughts?