The thing stopping most teams changing analytics tool is not the new tool. It is the four years of history in the old one.
Start from what is true
Skomi does not import your old data, and no import would give you what you want anyway.
Two tools count differently: different bot rules, different session boundaries, different time zone handling, different opinions about what a visit is. Loading last year's Google Analytics export into a new tool produces a chart with a visible seam where the definitions change, and every year-on-year comparison across that seam is arithmetic on two different units.
An import that looked seamless would be worse than none, because you would trust it.
What to do instead
1. Export before you cancel. Whatever the old tool gives you: monthly totals, top pages, top sources, conversions. Do it while the account is still open, not in the last week of the notice period.
Keep it as a flat file somewhere findable. You are keeping a record, not a dataset you will query.
2. Run both for a while. A month is usually enough, a quarter if your traffic is seasonal. This is not about validation, because they will not agree, see why two analytics tools never agree. It is about learning the size of the gap so you can talk about it later.
3. Write the changeover date down. An annotation on the chart, and a line in whatever document your reporting lives in. Every awkward question for the next year is answered by that date.
4. Move the comparisons that survive. Ratios and shapes travel between tools; absolute counts do not. Conversion rate, share of traffic by channel, the ranking of your top ten pages all stay meaningful. "Visits were up 8%" across the seam does not.
What you will actually miss
Less than you expect. In practice teams look at the last 90 days constantly, the last year occasionally, and anything older almost never, usually to answer one specific question a saved export would have covered.
Before treating a long history as the reason to stay, look at what you opened in the past six months.
Whatever you move to, the new history starts the day the snippet goes in. On the Analytics page that history runs as far back as your plan's retention window, and the comparison pages put the candidates side by side row by row, including the rows where they win.
Related: how long to keep analytics data, self-hosted or hosted analytics, and installing the snippet.