I live in Argentina where everyone use tape and nobody know Wago connectors.
Should I use tape or Wago for my house? Wago can be purchased on Ebay, not in local shops.
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Electrical tape is an insulating means, not a way of mechanically holding together a connection. In fact, old school "twisted and taped" joints had a secret sauce to them: solder! The idea behind them was that twisting the wires together provided mechanical stability, the solder wetted the wires, filled the gaps, and made a gastight electrical connection, and only then you applied the tape (friction tape back then) to insulate the whole shebang. Omit the solder, and you have little to no electrical connectivity.
In this day and age, we have better ways of making gastight connections. Push-in style connectors (such as what Wago is best known for) use a spring system to grab individual wires in a gastight fashion; when designed properly, it can be quite an effective setup, even in the hands of a novice installer. Wirenuts use spring pressure to hold a twisted bundle of wires together; while a bit more technique-sensitive than push-in connectors or screwlugs, they can be made extremely inexpensively, leading to their widespread use in some parts of the world.
There are also a couple different styles of screw-based connectors (North American style mechanical lugs and Eurostyle device and splicing blocks) that rely on correct torquing to achieve a gastight connection between a screw or screw-driven pressure plate and the wire end, as well as the old standby of compression or crimp connectors. These rely not on technique, but on proper tooling for reliable joints: screw-type connectors practically require a torque screwdriver or torque wrench to get right consistently, while crimp connectors require a suitable crimping tool.