A standalone Brazil or Indonesia position rarely outperforms an EM ETF over a 10-year horizon after costs. The exceptions are countries where one factor — currency, governance, demographic — is so distinctive that the country exposure is the bet.
Japan is the most common example: a deflationary monetary regime, governance reform, and structural demographic profile that don't blend cleanly into a 'developed ex-US' bucket. Switzerland offers concentrated quality exposure and a defensive currency. Singapore is the cleanest backdoor to ASEAN.