GTM Club"Hi {{firstName}}, I saw you work at {{company}}" is not personalisation; it is a template admitting it is one. Real personalisation is a first line that could only have been written for this account: the job they posted, the tool they switched to, the thing their CEO said on a podcast.
The economics changed with AI copywriting: what used to take an SDR five minutes per account now takes a model five seconds, so the question is no longer whether to personalise but what signal to personalise on.