Thinking about scalability or portability of the code from day 1 is useful because it may be difficult to crowbar those things in on day 200. That said, don't

Thinking about scalability or portability of the code from day 1 is useful because it may be difficult to crowbar those things in on day 200. That said, don't dither too much over writing code. History favours the doers rather than the vacillators. Most software except for utilities has a quite short working life anyway. There is also the standard advice of "expect to throw one away".