Limited in the sense that my contacts and their contacts etc. eventually reach some maximum. But getting jobs through connections works an order of magnitude better, at least, than filling out applications online. The main difference comes down to actively targeting companies and talking to contacts versus passively clicking through web sites then waiting for a response.

Another difference: focusing on relationships and business domain expertise, versus trying to exactly match a "tech stack" to job listings. No company ever needs another five thousand lines of JavaScript. They need people who can solve business problems and add value.

I live abroad and travel constantly, but only work for US companies. They pay better and I don't have any language or culture mismatches.