Interesting read. What was your conclusion to the below?:

I also wondered if a domain name under a country code top-level domain (ccTLD) like .in is more susceptible to this kind of sinkholing than a domain name under a generic top-level domain (gTLD) like .com.

That appears to be answered in the following sentences:

> I asked Benedict if it is worth migrating my website from .in to .com. He replied that in his personal opinion, NIXI runs an excellent, clean registry, and are very responsive in resolving issues when they arise. He also added that domain generation algorithms (DGAs) of malware are equally, and possibly more, problematic for .com domains. He advised against migrating my website.

I am still using the .in domain name since the sinkhole issue was resolved in Dec 2019. I haven't faced any issue again. So that was a total of 1 issue in 14 years of using a .in domain name. I am not certain if I can draw any conclusion yet other than what is already mentioned in my blog post which @vxNsr has quoted in a sibling comment.